NEET · 2017

NEET 2017
Previous Year Questions

Complete NEET 2017 question paper — 180 questions across Physics, Chemistry and Biology with detailed solutions and AI explanations.

180

Total

45

Physics

44

Chemistry

91

Biology

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Difficulty:180 questions

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12017

The final proof for DNA as the genetic material came from the experiments of

Easy NEET 2017Genetics And EvolutionClass 12DNA as Genetic Material

22017

Spliceosomes are not found in cells of

Easy NEET 2017Cell: The Unit of LifeClass 11RNA Processing and Spliceosomes

32017

The pivot joint between atlas and axis is a type of

Easy NEET 2017Locomotion and MovementClass 11Types of Joints

42017

The association of histone H1 with a nucleosome indicates:

Medium NEET 2017Cell: The Unit of LifeClass 11Nucleosome and Histones

52017

Which of the following is made up of dead cells?

Easy NEET 2017Structural Organisation In Animals And PlantsClass 11Plant Tissues

62017

Select the correct route for the passage of sperms in male frogs:

Medium NEET 2017ReproductionClass 12Reproductive System of Frog

72017

Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature? (a) They do not need to reproduce (b) They are somatic cells (c) They do not metabolize (d) All their internal space is available for oxygen transport Options:

Medium NEET 2017Human PhysiologyClass 11Body Fluids and Circulation

82017

Homozygous purelines in cattle can be obtained by

Easy NEET 2017Genetics And EvolutionClass 12Inbreeding

92017

A temporary endocrine gland in the human body is

Easy NEET 2017Human PhysiologyClass 11Chemical Coordination and Regulation

102017

Viroids differ from viruses in having

Easy NEET 2017Diversity In Living WorldClass 11Viruses and Viroids

112017

A decrease in blood pressure/volume will not cause the release of

Medium NEET 2017Human PhysiologyClass 11Excretory Products and their Elimination

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122017

An example of colonial alga is

Easy NEET 2017Diversity In Living WorldClass 11Algae

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132017

The morphological nature of the edible part of coconut is

Medium NEET 2017Structural Organisation In Animals And PlantsClass 11Fruit and Seed

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142017

Which of the following is correctly matched for the product produced by them?

Easy NEET 2017Biology And Human WelfareClass 12Microbes in Human Welfare

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152017

Match the following sexually transmitted diseases (Column-I) with their causative agent (Column-II) and select the correct option.

Medium NEET 2017ReproductionClass 12Reproductive Health and Sexually Transmitted Diseases

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162017

In case of poriferans the spongocoel is lined with flagellated cells called

Easy NEET 2017Diversity In Living WorldClass 11Porifera

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172017

Among the following characters, which one was not considered by Mendel in his experiments on pea?

Easy NEET 2017Genetics And EvolutionClass 12Mendelian Inheritance

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182017

Identify the wrong statement in context of heartwood.

Medium NEET 2017Plant PhysiologyClass 11Transport in Plants - Heartwood

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192017

During DNA replication, Okazaki fragments are used to elongate

Medium NEET 2017Cell: The Unit of LifeClass 12DNA Replication

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202017

Mycorrhizae are the example of

Easy NEET 2017Biology And Human WelfareClass 12Microbes in Human Welfare

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212017

Which of the following RNAs should be most abundant in animal cell?

Easy NEET 2017Cell: The Unit of LifeClass 11Biomolecules and RNA

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222017

The process of separation and purification of expressed protein before marketing is called

Medium NEET 2017Biotechnology And Its ApplicationsClass 12Bioprocessing and Downstream Processing

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232017

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?

Easy NEET 2017Cell: The Unit of LifeClass 11Prokaryotic Cells

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242017

Which of the following components provides sticky character to the bacterial cell?

Easy NEET 2017Cell: The Unit of LifeClass 11Prokaryotic Cell Envelope

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252017

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

Medium NEET 2017Plant PhysiologyClass 11Photosynthesis

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262017

Which of the following options best represents the enzyme composition of pancreatic juice?

Medium NEET 2017Human PhysiologyClass 11Digestion and Absorption

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272017

Which one of the following statements is correct, with reference to enzymes?

Easy NEET 2017Cell: The Unit of LifeClass 11Enzymes

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282017

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of RNA becomes 998 bases, how many codons will be altered?

Medium NEET 2017Cell: The Unit of LifeClass 12Genetic Code and Translation

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292017

Asymptote in a logistic growth curve is obtained when

Medium NEET 2017Ecology And EnvironmentClass 12Population Growth

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302017

Select the mismatch

Medium NEET 2017Diversity In Living WorldClass 11Plant Kingdom

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312017

Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?

Hard NEET 2017Cell: The Unit of LifeClass 11Cell Cycle and Mitosis

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322017

Which ecosystem has the maximum biomass?

Easy NEET 2017Ecology And EnvironmentClass 12Ecosystem Productivity

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332017

Zygotic meiosis is characteristic of

Medium NEET 2017Plant PhysiologyClass 11Plant Life Cycles

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342017

Hypersecretion of Growth Hormone in adults does not cause further increase in height, because

Easy NEET 2017Human PhysiologyClass 11Chemical Coordination and Integration

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352017

Frog's heart when taken out of the body continues to beat for some time. Select the best option from the following statements: (a) Frog is a poikilotherm (b) Frog does not have any coronary circulation (c) Heart is "myogenic" in nature (d) Heart is autoexcitable

Medium NEET 2017Human PhysiologyClass 11Body Fluids and Circulation

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362017

Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune-response is responsible for such rejections?

Medium NEET 2017Human PhysiologyClass 12Body Defence Mechanism

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372017

Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement.

Medium NEET 2017Genetics And EvolutionClass 12Mendelian Disorders

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382017

An important characteristic that Hemichordates share with Chordates is

Medium NEET 2017Diversity In Living WorldClass 11Animal Kingdom - Hemichordata and Chordata

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392017

Double fertilization is exhibited by

Easy NEET 2017ReproductionClass 12Sexual Reproduction in Flowering Plants

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402017

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?

Easy NEET 2017Cell: The Unit of LifeClass 11Cell Organelles

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412017

Lungs are made up of air-filled sacs the alveoli. They do not collapse even after forceful expiration, because of:

Easy NEET 2017Human PhysiologyClass 11Breathing and Respiration

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422017

Which of the following are not polymeric?

Easy NEET 2017Cell: The Unit of LifeClass 11Biomolecules

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432017

Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by

Medium NEET 2017ReproductionClass 12Pollination

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442017

Life cycle of Ectocarpus and Fucus respectively are

Medium NEET 2017Plant PhysiologyClass 11Plant Life Cycles

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452017

Presence of plants arranged into well defined vertical layers depending on their height can be seen best in

Medium NEET 2017Ecology And EnvironmentClass 12Forest Ecosystem

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462017

Phosphoenol pyruvate (PEP) is the primary CO $_2$ acceptor in:

Medium NEET 2017Plant PhysiologyClass 11Photosynthesis - C4 Pathway

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472017

Good vision depends on adequate intake of carotene rich food. Select the best option from the following statements: (a) Vitamin A derivatives are formed from carotene (b) The photopigments are embedded in the membrane discs of the inner segment (c) Retinal is a derivative of vitamin A (d) Retinal is a light absorbing part of all the visual photopigments

Hard NEET 2017Human PhysiologyClass 11Chemical Coordination and Integration

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482017

Which one from those given below is the period for Mendel's hybridization experiments?

Easy NEET 2017Genetics And EvolutionClass 12Mendelian Inheritance

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492017

Select the mismatch:

Medium NEET 2017Biology And Human WelfareClass 12Microbes in Human Welfare

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502017

Attractants and rewards are required for

Easy NEET 2017ReproductionClass 12Pollination

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512017

In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilisation?

Medium NEET 2017ReproductionClass 12Reproductive Health - Assisted Reproductive Technologies

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522017

Which among these is the correct combination of aquatic mammals?

Easy NEET 2017Diversity In Living WorldClass 11Animal Kingdom - Mammalia and Chondrichthyes

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532017

Functional megaspore in an angiosperm develops into

Medium NEET 2017ReproductionClass 12Sexual Reproduction in Flowering Plants

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542017

Root hairs develop from the region of

Easy NEET 2017Structural Organisation In Animals And PlantsClass 11Root Anatomy

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552017

A dioecious flowering plant prevents both:

Medium NEET 2017ReproductionClass 12Pollination

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562017

The hepatic portal vein drains blood to liver from

Easy NEET 2017Human PhysiologyClass 11Body Fluids and Circulation

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572017

What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis?

Medium NEET 2017Biotechnology And Its ApplicationsClass 12DNA Fingerprinting and Gel Electrophoresis

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582017

Which of the following represents order of 'Horse'?

Medium NEET 2017Diversity In Living WorldClass 11Animal Kingdom - Mammalia

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592017

Which statement is wrong for Kreb's cycle?

Hard NEET 2017Plant PhysiologyClass 11Respiration - Krebs Cycle

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602017

Artificial selection to obtain cows yielding higher milk output represents

Medium NEET 2017Genetics And EvolutionClass 12Artificial Selection

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612017

The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as

Easy NEET 2017Ecology And EnvironmentClass 12Biodiversity Conservation

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622017

Receptor sites for neurotransmitters are present on

Easy NEET 2017Human PhysiologyClass 11Neural Control and Coordination

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632017

The vascular cambium normally gives rise to

Medium NEET 2017Structural Organisation In Animals And PlantsClass 11Secondary Growth

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642017

A baby boy aged two years is admitted to play school and passed through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?

Easy NEET 2017Human PhysiologyClass 11Digestion and Absorption

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652017

The water potential of pure water is

Easy NEET 2017Plant PhysiologyClass 11Water Potential

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662017

DNA fragments are

Easy NEET 2017Biotechnology And Its ApplicationsClass 12Gel Electrophoresis

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672017

Capacitation occurs in

Medium NEET 2017ReproductionClass 12Human Reproduction

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682017

The function of copper ions in copper releasing IUD's is

Easy NEET 2017ReproductionClass 12Reproductive Health - Birth Control

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692017

A gene whose expresson helps to identify transformed cell is known as

Medium NEET 2017Biotechnology And Its ApplicationsClass 12Recombinant DNA Technology

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702017

Which one of the following statements is not valid for aerosols?

Medium NEET 2017Ecology And EnvironmentClass 12Environmental Issues - Air Pollution

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712017

Which of the following statements is correct?

Medium NEET 2017Human PhysiologyClass 11Excretory Products and their Elimination

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722017

Which of the following in sewage treatment removes suspended solids?

Easy NEET 2017Biology And Human WelfareClass 12Sewage Treatment

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732017

GnRH, a hypothalamic hormone, needed in reproduction, acts on

Medium NEET 2017Human PhysiologyClass 11Chemical Coordination and Integration

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742017

Which of the following facilitates opening of stomatal aperture?

Hard NEET 2017Plant PhysiologyClass 11Transpiration and Stomatal Movement

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752017

The genotypes of a Husband and Wife are $I^A I^B$ and $I^A i$ . Among the blood types of their children, how many different genotypes and phenotypes are possible?

Hard NEET 2017Genetics And EvolutionClass 12Inheritance of Blood Groups

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762017

Plants which produce characteristic pneumatophores and show vivipary belong to

Medium NEET 2017Ecology And EnvironmentClass 12Organisms and Environment

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772017

Alexander Von Humboldt described for the first time

Medium NEET 2017Ecology And EnvironmentClass 12Species Diversity

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782017

DNA replication in bacteria occurs

Easy NEET 2017Cell: The Unit of LifeClass 11Cell Cycle and Cell Division

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792017

MALT constitutes about ________ percent of the lymphoid tissue in human body

Easy NEET 2017Human PhysiologyClass 12Body Defence Mechanism

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802017

In Bougainvillea thorns are the modifications of

Medium NEET 2017Structural Organisation In Animals And PlantsClass 11Morphology of Flowering Plants

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812017

Fruit and leaf drop at early stages can be prevented by the application of

Medium NEET 2017Plant PhysiologyClass 11Plant Growth Regulators

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822017

Which of the following are found in extreme saline conditions?

Easy NEET 2017Diversity In Living WorldClass 11Kingdom Monera - Archaebacteria

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832017

Coconut fruit is a

Easy NEET 2017Structural Organisation In Animals And PlantsClass 11Fruit

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842017

The DNA fragments separated on an agarose gel can be visualised after staining with

Easy NEET 2017Biotechnology And Its ApplicationsClass 12Gel Electrophoresis

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852017

Out of $X$ pairs of ribs in humans only $Y$ pairs are true ribs. Select the option that correctly represents values of $X$ and $Y$ and provides their explanation:

Medium NEET 2017Structural Organisation In Animals And PlantsClass 11Human Skeletal System

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862017

Myelin sheath is produced by

Medium NEET 2017Human PhysiologyClass 11Neural Control and Coordination

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872017

Which of the following options gives the correct sequence of events during mitosis?

Hard NEET 2017Cell: The Unit of LifeClass 11Cell Cycle and Mitosis

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882017

A disease caused by an autosomal primary non-disjunction is

Medium NEET 2017Genetics And EvolutionClass 12Chromosomal Disorders

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892017

Which cells of 'Crypts of Lieberkuhn' secrete antibacterial lysozyme?

Medium NEET 2017Human PhysiologyClass 11Digestion and Absorption

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902017

Which one of the following is related to $Ex\text{-}situ$ conservation of threatened animals and plants?

Easy NEET 2017Ecology And EnvironmentClass 12Biodiversity Conservation

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912017

Which of the following statements is not correct?

Easy NEET 2017BiomoleculesClass 11Proteins and Denaturation

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922017

The equilibrium constants of the following reactions are:

Hard NEET 2017EquilibriumClass 11Chemical Equilibrium

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932017

The heating of phenyl-methyl ether with HI produces:

Easy NEET 2017Alcohols, Phenols and EthersClass 12Ethers

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942017

The most suitable method for separation of a $1:1$ mixture of ortho and para-nitrophenols is:

Medium NEET 2017Alcohols, Phenols and EthersClass 12Phenols

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952017

Predict the correct intermediate and product in the following reaction:

Hard NEET 2017HydrocarbonsClass 11Alkynes

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962017

Which of the following reactions is appropriate for converting acetamide to methanamine?

Medium NEET 2017AminesClass 12Amines

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972017

The IUPAC name of the following compound is ___________:

Hard NEET 2017Alcohols, Phenols and EthersClass 12Aldehydes and Ketones

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982017

Which of the following is a sink for CO?

Easy NEET 2017Environmental ChemistryClass 12Carbon Monoxide Sink

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992017

Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

Medium NEET 2017Alcohols, Phenols and EthersClass 12Aldol Condensation

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1002017

Which of the following pairs of compounds is isoelectronic and isostructural?

Medium NEET 2017Chemical Bonding and Molecular StructureClass 11Isoelectronic and Isostructural Species

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1012017

Consider the following reactions and identify $A$ , $X$ , $Y$ and $Z$ :

Hard NEET 2017Alcohols, Phenols and EthersClass 12Aldehydes and Ketones

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1022017

Which one of the following compounds is the most acidic?

Medium NEET 2017Alcohols, Phenols and EthersClass 12Phenols

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1032017

Name the gas that can readily decolourise acidified $KMnO_4$ solution:

Easy NEET 2017ElectrochemistryClass 11Oxidation Reactions

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1042017

Which one is the correct order of acidity?

Hard NEET 2017HydrocarbonsClass 11Acidity of Hydrocarbons

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1052017

Concentration of the $Ag^+$ ions in a saturated solution of $Ag_2C_2O_4$ is $2.2 \times 10^{-4}\,\text{mol L}^{-1}$ . The solubility product of $Ag_2C_2O_4$ is:

Medium NEET 2017EquilibriumClass 11Solubility Product

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1062017

With respect to the conformers of ethane, which of the following statements is true?

Easy NEET 2017Chemical Bonding and Molecular StructureClass 11Conformations

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1072017

The correct statement regarding electrophile is

Easy NEET 2017Organic Chemistry: Some Basic Principles and TechniquesClass 11Electrophiles and Nucleophiles

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1082017

Which one is the wrong statement?

Medium NEET 2017Structure of AtomClass 11Hydrogen-like atoms, de Broglie wavelength, uncertainty principle

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1092017

Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co³⁺ is

Medium NEET 2017Coordination CompoundsClass 12Crystal Field Theory and Spectrochemical Series

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1102017

Match the interhalogen compounds of column I with the geometry in column II and assign the correct code

Medium NEET 2017Chemical Bonding and Molecular StructureClass 11VSEPR Theory and Shapes of Molecules

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1112017

The species having bond angles of 120° is

Easy NEET 2017Chemical Bonding and Molecular StructureClass 11VSEPR Theory and Shapes of Molecules

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1122017

The correct increasing order of basic strength for the following compounds is

Medium NEET 2017Organic Chemistry: Some Basic Principles and TechniquesClass 11Electronic Effects (+R and –R effects), Basic Strength of Amines

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1132017

Which of the following statements is not correct?

Medium NEET 2017Chemical KineticsClass 12Catalysis and Effect of Catalyst on Equilibrium

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1142017

A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy ΔU of the gas in joule will be

Medium NEET 2017ThermodynamicsClass 11First Law of Thermodynamics and Internal Energy

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1152017

A 20 litre container at 400 K contains CO₂(g) at pressure 0.4 atm and an excess of SrO (neglect volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO₂ attains its maximum value, will be: (Given that : SrCO₃(s) ⇌ SrO(s) + CO₂(g), K $_p$ = 1.6 atm)

Hard NEET 2017EquilibriumClass 11Equilibrium Constant (Kp)

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1162017

Mechanism of a hypothetical reaction X₂ + Y₂ → 2XY is given below: (i) X₂ → X + X (fast) (ii) X + Y₂ ⇌ XY + Y (slow) (iii) X + Y → XY (fast) The overall order of the reaction will be

Hard NEET 2017Chemical KineticsClass 12Order of Reaction and Reaction Mechanism

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1172017

In which pair of ions both the species contain S–S bond?

Medium NEET 2017P-Block ElementsClass 12Structure of Oxyanions of Sulphur

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1182017

Which one of the following pairs of species have the same bond order?

Medium NEET 2017Chemical Bonding and Molecular StructureClass 11Molecular Orbital Theory and Bond Order

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1192017

Mixture of chloroxylenol and terpineol acts as

Easy NEET 2017Chemistry In Everyday LifeClass 12Antiseptics and Disinfectants

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1202017

It is because of inability of ns² electrons of the valence shell to participate in bonding that

Medium NEET 2017P-Block ElementsClass 12Inert Pair Effect

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1212017

For a given reaction, ΔH = 35.5 kJ mol⁻¹ and ΔS = 83.6 JK⁻¹ mol⁻¹. The reaction is spontaneous at: (Assume that ΔH and ΔS do not vary with temperature)

Medium NEET 2017ThermodynamicsClass 11Gibbs Free Energy and Spontaneity

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1222017

If molality of the dilute solution is doubled, the value of molal depression constant (K $_f$ ) will be

Easy NEET 2017SolutionsClass 12Colligative Properties – Depression in Freezing Point

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1232017

Which of the following is dependent on temperature?

Easy NEET 2017SolutionsClass 12Concentration Terms

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1242017

Pick out the correct statement with respect to [Mn(CN)₆]³⁻

Medium NEET 2017Coordination CompoundsClass 12Hybridisation, Crystal Field Theory and Magnetic Properties

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1252017

Which is the incorrect statement?

Medium NEET 2017Solid StateClass 12Crystal Defects and Electrical Properties of Solids

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1262017

HgCl₂ and I₂ both when dissolved in water containing I⁻ ions, the pair of species formed is

Hard NEET 2017Coordination CompoundsClass 12Complex Formation and Stability Constants

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1272017

Extraction of gold and silver involves leaching with CN⁻ ion. Silver is later recovered by

Medium NEET 2017General Principles And Processes Of Isolation Of ElementsClass 12Leaching and Extraction of Silver/Gold

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1282017

The correct order of the stoichiometries of AgCl formed when AgNO₃ in excess is treated with the complexes: CoCl₃·6NH₃, CoCl₃·5NH₃, CoCl₃·4NH₃ respectively is

Medium NEET 2017Coordination CompoundsClass 12Werner's Coordination Theory and Ionisation

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1292017

Identify A and predict the type of reaction

Hard NEET 2017Haloalkanes And HaloarenesClass 12Nucleophilic Aromatic Substitution via Benzyne Mechanism

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1302017

An example of a sigma bonded organometallic compound is

Easy NEET 2017Organometallic CompoundsClass 12Sigma-bonded Organometallic Compounds

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1312017

The reason for greater range of oxidation states in actinoids is attributed to

Easy NEET 2017F-Block ElementsClass 12Oxidation States of Actinoids

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1322017

The element Z = 114 has been discovered recently. It will belong to which of the following family group and electronic configuration?

Medium NEET 2017Classification of Elements and Periodicity in PropertiesClass 11Periodic Table and Electronic Configuration

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1332017

A first order reaction has a specific reaction rate of 10⁻² s⁻¹. How much time will it take for 20 g of the reactant to reduce to 5 g?

Medium NEET 2017Chemical KineticsClass 12First Order Reaction and Half-Life

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1342017

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

Medium NEET 2017S-Block ElementsClass 11Hydration Energy and Ionic Mobility

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1352017

In the electrochemical cell Zn|ZnSO₄(0.01 M)||CuSO₄(1.0 M)|Cu, the emf of this Daniell cell is E₁. When the concentration of ZnSO₄ is changed to 1.0 M and that of CuSO₄ changed to 0.01 M, the emf changes to E₂. From the following, which one is the relationship between E₁ and E₂? (Given, RT/F = 0.059

Medium NEET 2017ElectrochemistryClass 12Nernst Equation and Cell EMF

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1362017

A spring of force constant $k$ is cut into lengths of ratio $1:2:3$ . They are connected in series and the new force constant is $k'$ . Then they are connected in parallel and force constant is $k''$ . Then $k' : k''$ is

Medium NEET 2017Oscillations and WavesClass 11Oscillations of a Spring

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1372017

Thermodynamic processes are indicated in the following diagram.

Hard NEET 2017ThermodynamicsClass 11Thermodynamic Processes

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1382017

A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of the resulting system

Medium NEET 2017Electric Charges and FieldsClass 12Capacitance and Capacitors

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1392017

A U-tube with both ends open to the atmosphere, is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a distance of $10\ \text{mm}$ above the water level on the other side. Meanwhile the water rises by $65\ \text{mm}$ from its original level (see diagram). The density of the oil is

Hard NEET 2017Properties Of Bulk MatterClass 11Fluid Statics

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1402017

The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature $T$ Kelvin and mass $m$ , is

Hard NEET 2017Dual Nature of Radiation and MatterClass 12de Broglie Wavelength

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1412017

The acceleration due to gravity at a height $1\ \text{km}$ above the earth is the same as at a depth $d$ below the surface of earth. Then

Medium NEET 2017GravitationClass 11Variation of Acceleration due to Gravity

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1422017

The $x$ and $y$ coordinates of the particle at any time are $x = 5t - 2t^2$ and $y = 10t$ respectively, where $x$ and $y$ are in meters and $t$ in seconds. The acceleration of the particle at $t = 2\ \text{s}$ is

Medium NEET 2017Motion in a PlaneClass 11Kinematics in Two Dimensions

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1432017

In a common emitter transistor amplifier the audio signal voltage across the collector is $3\ \text{V}$ . The resistance of collector is $3\ \text{k}\Omega$ . If current gain is $100$ and the base resistance is $2\ \text{k}\Omega$ , the power gain of the amplifier is

Medium NEET 2017Current ElectricityClass 12Transistor Amplifier

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1442017

An arrangement of three parallel straight wires placed perpendicular to the plane of paper carrying same current $I$ along the same direction is shown in figure. Magnitude of force per unit length on the middle wire $B$ is given by

Hard NEET 2017Moving Charges and MagnetismClass 12Force Between Parallel Current Carrying Conductors

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1452017

Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will:

Easy NEET 2017GravitationClass 11Universal Law of Gravitation

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1462017

A Carnot engine having an efficiency of $\dfrac{1}{10}$ as heat engine, is used as a refrigerator. If the work done on the system is $10\ \text{J}$ , the amount of energy absorbed from the reservoir at lower temperature is

Hard NEET 2017ThermodynamicsClass 11Heat Engine and Refrigerator

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1472017

A $250$ -turn rectangular coil of length $2.1\ \text{cm}$ and width $1.25\ \text{cm}$ carries a current of $85\ \mu\text{A}$ and is subjected to a magnetic field of $0.85\ \text{T}$ . Work done for rotating the coil by $180^{\circ}$ against the torque is

Hard NEET 2017Moving Charges and MagnetismClass 12Magnetic Dipole in Uniform Magnetic Field

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1482017

Which one of the following represents forward bias diode?

Medium NEET 2017Semiconductor ElectronicsClass 12p-n Junction Diode

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1492017

The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is

Medium NEET 2017Atoms And NucleiClass 12Hydrogen Spectrum

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1502017

Figure shows a circuit contains three identical resistors with resistance $R = 9.0\ \Omega$ each, two identical inductors with inductance $L = 2.0\ \text{mH}$ each, and an ideal battery with $\varepsilon = 18\ \text{V}$ . The current $i$ through the battery just after the switch is closed is

Hard NEET 2017Current ElectricityClass 12L-R-C Circuits

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1512017

Two blocks $A$ and $B$ of masses $3m$ and $m$ respectively are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of $A$ and $B$ immediately after the string is cut, are respectively

Hard NEET 2017Laws of MotionClass 11Tension and Acceleration

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1522017

A long solenoid of diameter $0.1\,\text{m}$ has $2 \times 10^4$ turns per meter. At the centre of the solenoid, a coil of $100$ turns and radius $0.01\,\text{m}$ is placed with its axis coinciding with the solenoid axis. The current in the solenoid decreases uniformly from $4\,\text{A}$ to $0\,\text{A}$ in $0.05\,\text{s}$ . If the resistance of the coil is $10\pi^2\,\Omega$ , then the total charge flowing through the coil during this time is:

Medium NEET 2017Electromagnetic InductionClass 12Electromagnetic Induction

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1532017

A physical quantity having dimensions of length can be formed using the quantities $c$ , $G$ and $\dfrac{e^2}{4\pi\varepsilon_0}$ . Which of the following combinations represents length?

Hard NEET 2017Units and MeasurementsClass 11Dimensional Analysis

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1542017

In an electromagnetic wave in free space, the root mean square value of electric field is $E_{\text{rms}} = 6\,\text{V/m}$ . The peak value of magnetic field is:

Easy NEET 2017Electromagnetic WavesClass 12Electromagnetic Waves

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1552017

The resistance of a wire is $R\,\Omega$ . If it is melted and stretched to $n$ times its original length, then its new resistance will be:

Easy NEET 2017Current ElectricityClass 12Electrical Resistance

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1562017

The ratio of resolving powers of an optical microscope for two wavelengths $\lambda_1 = 4000\,\text{\AA}$ and $\lambda_2 = 6000\,\text{\AA}$ is:

Easy NEET 2017OpticsClass 12Microscope and Resolving Power

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1572017

A thin prism having refracting angle $10^\circ$ is made of glass of refractive index $1.42$ . This prism is combined with another thin prism of glass of refractive index $1.7$ . The combination produces dispersion without deviation. The refracting angle of the second prism should be:

Medium NEET 2017OpticsClass 12Refraction Through Prism

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1582017

Two Polaroids $P_1$ and $P_2$ are placed with their transmission axes perpendicular to each other. Unpolarised light of intensity $I_0$ is incident on $P_1$ . A third Polaroid $P_3$ is placed between $P_1$ and $P_2$ such that its axis makes an angle $45^\circ$ with that of $P_1$ . The intensity of transmitted light through $P_2$ is:

Medium NEET 2017OpticsClass 12Polarization

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1592017

A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves:

Easy NEET 2017Current ElectricityClass 12Potentiometer

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1602017

The two nearest harmonics of a tube closed at one end and open at the other end are $220\,\text{Hz}$ and $260\,\text{Hz}$ . What is the fundamental frequency of the system?

Medium NEET 2017Oscillations and WavesClass 11Standing Waves in Organ Pipes

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1612017

A beam of light from a source $L$ is incident normally on a plane mirror fixed at a distance $x$ from the source. The beam is reflected back as a spot on a scale placed just above the source $L$ . When the mirror is rotated through a small angle $\theta$ , the spot of light is found to move through a distance $y$ on the scale. The angle $\theta$ is given by:

Medium NEET 2017OpticsClass 12Reflection of Light

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1622017

The given electrical network is equivalent to:

Medium NEET 2017Semiconductor ElectronicsClass 12Logic Gates

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1632017

A particle executes linear simple harmonic motion with amplitude $3\,\text{cm}$ . When the particle is at a distance $2\,\text{cm}$ from the mean position, the magnitude of its velocity is equal to that of its acceleration. The time period of the motion is:

Medium NEET 2017Oscillations and WavesClass 11Simple Harmonic Motion

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1642017

Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time $t_1$ . On another day, if she remains stationary on the moving escalator, then the escalator takes her up in time $t_2$ . The time taken by her to walk up on the moving escalator will be:

Medium NEET 2017KinematicsClass 11Relative Velocity

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1652017

Two discs of the same moment of inertia rotating about their regular axis passing through the centre and perpendicular to the plane of the disc with angular velocities $\omega_1$ and $\omega_2$ are brought into contact face to face with their axes coinciding. The expression for loss of energy during this process is:

Hard NEET 2017System of Particles and Rotational MotionClass 11Conservation of Angular Momentum

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1662017

A gas mixture consists of $2$ moles of $O_2$ and $4$ moles of Ar at temperature $T$ . Neglecting all vibrational modes, the total internal energy of the system is:

Medium NEET 2017Kinetic TheoryClass 11Degrees of Freedom

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1672017

The bulk modulus of a spherical object is $B$ . If it is subjected to uniform pressure $p$ , then the fractional decrease in radius is:

Medium NEET 2017Properties Of Solids And LiquidsClass 11Bulk Modulus

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1682017

One end of a string of length $l$ is connected to a particle of mass $m$ and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in a circle with speed $v$ , the net force on the particle directed towards the centre will be ( $T$ represents the tension in the string):

Easy NEET 2017Laws of MotionClass 11Dynamics of Uniform Circular Motion

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1692017

A rope is wound around a hollow cylinder of mass $3\,\text{kg}$ and radius $40\,\text{cm}$ . What is the angular acceleration of the cylinder if the rope is pulled with a force of $30\,\text{N}$ ?

Medium NEET 2017System of Particles and Rotational MotionClass 11Torque and Angular Acceleration

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1702017

Young's double slit experiment is first performed in air and then repeated in a medium other than air. It is found that the eighth bright fringe in the medium lies where the fifth dark fringe lies in air. The refractive index of the medium is nearly:

Hard NEET 2017OpticsClass 12Young's Double Slit Experiment

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1712017

Suppose the charge of a proton and an electron differ slightly. One of them is -e, the other is $(e + \Delta e)$ . If the net electrostatic force and gravitational force between two hydrogen atoms placed at a distance $d$ apart are zero, then the value of $\Delta e$ is of the order of: (Given: mass of hydrogen atom $m_h = 1.67 \times 10^{-27}\,\text{kg}$ )

Hard NEET 2017Electric Charges and FieldsClass 12Coulomb's Law

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1722017

Two rods $A$ and $B$ of different materials are welded together as shown in the figure. Their thermal conductivities are $K_1$ and $K_2$ . The thermal conductivity of the composite rod will be:

Medium NEET 2017Properties Of Solids And LiquidsClass 11Thermal Conductivity

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1732017

The photoelectric threshold wavelength of silver is $3250 \times 10^{-10}\,\text{m}$ . The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength $2536 \times 10^{-10}\,\text{m}$ is: (Given: $h = 4.14 \times 10^{-15}\,\text{eV s}$ and $c = 3 \times 10^8\,\text{m/s}$ )

Medium NEET 2017Dual Nature of Radiation and MatterClass 12Photoelectric Effect

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1742017

Two cars moving in opposite directions approach each other with speeds of $22\,\text{m/s}$ and $16.5\,\text{m/s}$ respectively. The driver of the first car blows a horn having frequency $400\,\text{Hz}$ . The frequency heard by the driver of the second car is: (Velocity of sound $= 340\,\text{m/s}$ )

Medium NEET 2017Oscillations and WavesClass 11Doppler Effect

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1752017

Consider a drop of rain water having mass $1\,\text{g}$ falling from a height of $1\,\text{km}$ . It hits the ground with a speed of $50\,\text{m/s}$ . Take $g$ constant with a value $10\,\text{m/s}^2$ . The work done by (i) gravitational force and (ii) resistive force of air is:

Medium NEET 2017Work, Energy and PowerClass 11Work Energy Theorem

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1762017

A spherical black body with a radius of $12\,\text{cm}$ radiates $450\,\text{W}$ power at $500\,\text{K}$ . If the radius were halved and the temperature doubled, the power radiated in watt would be:

Medium NEET 2017Electromagnetic WavesClass 12Black Body Radiation

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1772017

The diagrams below show regions of equipotentials. A positive charge is moved from $A$ to $B$ in each diagram. Identify the correct statement regarding the work required.

Medium NEET 2017Electric Charges and FieldsClass 12Equipotential Surfaces

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1782017

Which of the following statements are correct? (a) Centre of mass of a body always coincides with the centre of gravity of the body. (b) Centre of mass of a body is the point at which the total gravitational torque on the body is zero. (c) A couple on a body produces both translational and rotational motion in a body. (d) Mechanical advantage greater than one means that small effort can be used to lift a large load.

Medium NEET 2017System of Particles and Rotational MotionClass 11Centre of Mass and Torque

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1792017

If $\theta_1$ and $\theta_2$ are the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip $\theta$ is given by:

Hard NEET 2017GravitationClass 12Dip and Earth Magnetism

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1802017

Radioactive material $A$ has decay constant $8\lambda$ and material $B$ has decay constant $\lambda$ . Initially they have the same number of nuclei. After what time will the ratio of number of nuclei of material $B$ to that of material $A$ be $\dfrac{1}{e}$ ?

Hard NEET 2017Atoms And NucleiClass 12Radioactive Decay

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