AIPMT 2008
Previous Year Questions
Complete AIPMT 2008 question paper — 200 questions across Physics, Chemistry and Biology with detailed solutions and AI explanations.
200
Total
53
Physics
45
Chemistry
102
Biology
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In DNA, the complementary bases are
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Which one of the following is an amine hormone?
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Select one of the following of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms
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Thermococcus, Methanococcus and Methanobacterium exemplify
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Which one of the following is heterosporous?
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In which one of the following male and female gametophytes do not have free living independent existence?
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Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature?
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Which one of the following phyla is correctly matched with its two general characteristics?
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Which one of the following in birds indicates their reptilian ancestry?
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Ascaris is characterized by
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Which one of the following is not a characteristic of phylum Annelida?
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Cellulose is the major component of cell walls of
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Vacuole in a plant cell
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A competitive inhibitor of succinic dehydrogenase is
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Polysome is formed by
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Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (a-e) make it useful as a storage material? a. Easily translocated b. Chemically non-reactive c. Easily digested by animals d. Osmotically inactive e. Synthesized during photosynthesis The useful properties are
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In the light of recent classification of living organisms into three domains of life (Bacteria, Archaea and Eukarya), which one of the following statements is true about archaea?
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Keeping in view the 'fluid mosaic model' for the structure of cell membrane, which one of the following statements is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?
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In germinating seeds fatty acids are degraded exclusively in the
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The two sub-units of ribosome remain united at a critical ion level of
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Thorn of Bougainvillea and tendril of Cucurbita are examples of
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Haploids are more suitable for mutation studies than diploids. This is because
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Which one of the following pairs of nitrogenous bases of nucleic acids is wrongly matched with the category mentioned against it?
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Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage?
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In DNA molecules
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What is true about the isolated small tribal populations?
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Which one of the following scientist's name is correctly matched with the theory put forth by him?
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Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?
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Darwin's Finches are an excellent example of
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Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?
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The fruit is chambered, developed from an inferior ovary and has seeds with succulent testa in
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The C plants are photosynthetically more efficient than C plants because
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The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because
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Dry indehiscent single-seeded fruit formed from a bicarpellary syncarpous inferior ovary is
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The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of
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Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in
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Vascular tissues in flowering plants develop from
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In leaves of C plants malic acid synthesis during CO fixation occurs in
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Importance of day length in flowering of plants was first shown in
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Endosperm is consumed by the developing embryo in the seed of
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Nitrogen fixation in root nodules of Alnus is brought about by
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The energy releasing process in which the substrate is oxidised without an external electron acceptor is called
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Replum is present in the ovary of flower of
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The fleshy receptacle of syconus of fig encloses a number of
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Electrons from excited chlorophyll molecule of photosystem II are accepted first by
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Which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?
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Which one of the following is the true description about an animal concerned?
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Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product?
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What is vital capacity of our lungs?
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Which one of the following is the correct difference between Rod Cells and Cone Cells of our retina?
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Which one of the following items gives its correct total number?
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Given below is a diagrammatic cross section of a single loop of human cochlea. Which one of the following options correctly represents the names of three different parts?
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Given below are four methods (A-D) and their modes of action (a-d) in achieving contraception. Select their correct matching from the four options that follow.
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What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?
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During the propagation of a nerve impulse, the action potential results from the movement of
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The blood calcium level is lowered by the deficiency of
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The most active phagocytic white blood cells are
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Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to
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In humans, blood passes from the post caval vein to the diastolic right atrium of heart due to
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In humans, at the end of the first meiotic division, the male germ cells differentiate into
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Which one of the following is resistant to enzyme action?
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The length of different internodes in a culm of sugarcane is variable because of
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Which one of the following pairs of plant structures has haploid number of chromosomes?
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What does the filiform apparatus do at the entrance into ovule?
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Unisexuality of flowers prevents
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Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?
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Which one of the following statements is incorrect about menstruation?
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The haemoglobin of a human foetus
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Consider the statements given below regarding contraception and answer as directed thereafter: (a) Medical Termination of Pregnancy (MTP) during first trimester is generally safe (b) Generally chances of conception are nil until mother breast-feeds the infant up to two years (c) Intrauterine devices like Copper-T are effective contraceptives (d) Contraception pills may be taken up to one week after coitus to prevent conception Which two of the above statements are correct?
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In human adult females oxytocin
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Which one of the following is the correct percentage of the two (out of the total of greenhouse gases) that contribute to the total global warming?
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Quercus species are the dominant component in
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About 70% of total global carbon is found in
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Which one of the following is not observed in biodiversity hotspots?
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World Summit on Sustainable Development (2002) was held in
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The slow rate of decomposition of fallen logs in nature is due to their
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Consider the following statements concerning food chains: (a) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation (b) Removal of most of the carnivores resulted in an increased population of deer (c) The length of food chains is generally limited to 3-4 trophic levels due to energy loss (d) The length of food chains may vary from 2 to 8 trophic levels Which two of the above statements are correct?
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According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometres) of the air pollutants is responsible for greatest harm to human health?
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The table below gives the populations (in thousands) of ten species (A-J) in four areas (a-d) consisting of the number of habitats given within brackets against each. Study the table and answer the question which follows. Which area out of a to d shows maximum species diversity?
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A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this: (a) Lots of urea and phosphate fertilizer were used in the crops in the vicinity (b) The area was sprayed with DDT by an aircraft (c) The lake water turned green and stinky (d) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis Which two of the above were the main causes of fish mortality in the lake?
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Consider the following four statements (a-d) about certain desert animals such as kangaroo rat. (a) They have dark colour and high rate of reproduction and excrete solid urine (b) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs (c) They feed on dry seeds and do not require drinking water (d) They excrete very concentrated urine and do not use water to regulate body temperature Which two of the above statements for such animals are true?
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A transgenic food crop which may help in solving the problem of night blindness in developing countries is
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Bacterial leaf blight of rice is caused by a species of
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Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
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Which one of the following is being tried in India as a biofuel substitute for fossil fuels?
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Trichoderma harzianum has proved a useful microorganism for
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Gel electrophoresis is used for
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To which type of barriers under innate immunity do the saliva in the mouth and the tears from the eyes belong?
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Match the disease in Column I with the appropriate items (pathogen/prevention/treatment) in Column II.
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Consider the following statements about biomedical technologies: (a) During open heart surgery blood is circulated in the heart-lung machine (b) Blockage in coronary arteries is removed by angiography (c) Computerised Axial Tomography (CAT) shows detailed internal structures as seen in a section of the body (d) X-ray provides clear and detailed images of organs like prostate glands and lungs Which two of the above statements are correct?
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Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?
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Which one of the following is the correct statement regarding the particular psychotropic drug specified?
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Cry I endotoxins obtained from Bacillus thuringiensis are effective against
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Modern detergents contain enzyme preparations of
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The linking of antibiotic resistance gene with the plasmid vector became possible with
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Which one of the following proved effective for biological control of nematodal disease in plants?
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Main objective of production/use of herbicide resistant GM crops is to
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Consider the following four measures (a-d) that could be taken to successfully grow chick-pea in an area where bacterial blight disease is common: (a) Spray with Bordeaux mixture (b) Control of the insect vector of the disease pathogen (c) Use of only disease-free seeds (d) Use of varieties resistant to the disease Which two of the above measures can control the disease?
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Human insulin is being commercially produced from a transgenic species of
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Cornea transplant in humans is almost never rejected. This is because
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Which of the following pairs of organs includes only the endocrine glands?
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What is antisense technology?
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If the lattice parameter for a crystalline structure is 3.6 Å, then the atomic radius in fcc crystal is
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The value of equilibrium constant for the reaction is 8.0. The equilibrium constant of the reaction will be
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If 'a' stands for the edge length of the cubic systems: simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be respectively
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Kohlrausch's law states that at
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Which of the following are not state functions? (I) q + w (II) q (III) w (IV) H − TS
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The bromination of acetone that occurs in acid solution is represented by the equation: These kinetic data were obtained for given reaction concentrations Based on these data, the rate equation is
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What volume of oxygen gas (O₂) measured at 0°C and 1 atm is needed to burn completely 1 L of propane gas (C₃H₈) measured under the same conditions?
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Bond dissociation enthalpy of H₂, Cl₂ and HCl are 434, 242 and 431 kJ mol⁻¹ respectively. Enthalpy of formation of HCl is
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Which of the following statements is not correct?
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Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the H⁺ ion concentration in the mixture?
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The values of Kₚ₁ and Kₚ₂ for the reactions are in the ratio 9 : 1. If the degree of dissociation of X and A are equal, then the total pressures at equilibrium for reactions (1) and (2) are in the ratio
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If the concentration of OH⁻ ions in the reaction is decreased by 1/4 times, then equilibrium concentration of Fe³⁺ will increase by
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For the gas phase reaction, PCl₅(g) ⇌ PCl₃(g) + Cl₂(g) which of the following conditions is correct?
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The rate constants k₁ and k₂ for two different reactions are 10¹⁶ · e⁻²⁰⁰⁰ᐟᵀ and 10¹⁵ · e⁻¹⁰⁰⁰ᐟᵀ respectively. The temperature at which k₁ = k₂ is
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Standard free energies of formation (in kJ mol⁻¹) at 298 K are -237.2, -394.4 and -8.2 for H₂O(l), CO₂(g) and pentane(g) respectively. The value of E°cell for the pentane-oxygen cell is
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The dissociation equilibrium of a gas AB₂ can be represented as: 2AB₂(g) ⇌ 2AB(g) + B₂(g) The degree of dissociation is x and is small compared to 1. The expression relating the degree of dissociation (x) with equilibrium constant Kp and total pressure P is
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The sequence of ionic mobility in aqueous solution is
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Percentage of free space in a body centred cubic unit cell is
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The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr (24) and Mn (25) is
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How many moles of lead(II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?
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Which of the following complexes exhibits the highest paramagnetic behaviour? (Where gly = glycine, en = ethylenediamine and bpy = bipyridyl moieties. Atomic numbers: Ti = 22, V = 23, Fe = 26, Co = 27)
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Volume occupied by one molecule of water (density = 1 g cm⁻³) is
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Number of moles of MnO₄⁻ required to oxidize one mole of ferrous oxalate completely in acidic medium will be
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On the basis of the following E° values, the strongest oxidizing agent is
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The alkali metals form salt-like hydrides by direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?
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Which one of the following arrangements does not give the correct picture of the trends indicated against it?
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In which of the following coordination entities is the magnitude of Δo (CFSE in octahedral field) maximum? (Atomic number of Co = 27)
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The angular shape of ozone molecule (O₃) consists of
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The correct order of increasing bond angles in the following triatomic species is
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Four diatomic species are listed below in different sequences. Which of these presents the correct order of their increasing bond order?
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Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH?
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In the hydrocarbon shown below, the state of hybridization of carbons 1, 3 and 5 are in the following sequence.
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Green chemistry means such reactions which
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A strong base can abstract an α-hydrogen from
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How many stereoisomers does the molecule CH₃CH=CHCH₂CHBrCH₃ have?
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The stability of carbanions in the following species is in the order of
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The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of
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The basic strength of the following carbanions a, b and c is in the order of
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A (predominantly) is
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Which one of the following is most reactive towards electrophilic attack?
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An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C = 38.71% and H = 9.67%. The empirical formula of the compound would be
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In a S2 substitution reaction of the type which one of the following has the highest relative rate?
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Acetophenone when reacted with a base, C₂H₅ONa, yields a stable compound which has the structure?
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In a reaction of aniline, a coloured product C was obtained.
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Which of the following statements is not true?
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Which two of the following five physical parameters have the same dimensions? (a) energy density (b) refractive index (c) dielectric constant (d) Young's modulus (e) magnetic field
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If the error in the measurement of radius of a sphere is 2%, then the error in the determination of volume of the sphere will be
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The distance travelled by a particle starting from rest and moving with an acceleration 4/3 ms⁻² in the third second is
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A particle moves in a straight line with a constant acceleration. It changes its velocity from 10 ms⁻¹ to 20 ms⁻¹ while passing through a distance 135 m in t second. The value of t is
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A particle shows distance-time curve as given in the figure. The maximum instantaneous velocity of the particle is around the point
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A particle of mass m is projected with velocity v making an angle of 45° with the horizontal. When the particle lands on the level ground the magnitude of the change in its momentum will be
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Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of v m/s will be
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Three forces acting on a body are shown in the figure. To have the resultant force only along the y-direction, the magnitude of the minimum additional force needed is
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Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10% of energy. How much power is generated by the turbine? (g = 10 m/s²)
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A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is
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The ratio of the radii of gyration of a circular disc to that of a circular ring, each of same mass and radius, around their respective axis is
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A thin rod of length L and mass M is bent at its midpoint into two halves so that the angle between them is 90°. The moment of inertia of the bent rod about an axis passing through the bending point and perpendicular to the plane defined by the two halves of the rod is
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A roller coaster is designed such that riders experience 'weightlessness' as they go round the top of a hill whose radius of curvature is 20 m. The speed of the car at the top of the hill is between
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If Q, E and W denote respectively the heat added, change in internal energy and the work done in a closed cyclic process, then
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On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are 39°W and 239°W respectively. What will be the temperature on the new scale, corresponding to a temperature of 39°C on the Celsius scale?
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At 10°C the value of the density of a fixed mass of an ideal gas divided by its pressure is x. At 110°C this ratio is
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Two Simple Harmonic Motions of angular frequency 100 and 1000 rad s⁻¹ have the same displacement amplitude. The ratio of their maximum accelerations is
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The wave described by y = 0.25 sin(10πx − 2πt) where x and y are in meters and t in seconds, is a wave travelling along the
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A point performs simple harmonic oscillation of period T and the equation of motion is given by x = a sin(ωt + π/6). After the elapse of what fraction of the time period will the velocity of the point be equal to half of its maximum velocity?
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Two points are located at a distance of 10 m and 15 m from the source of oscillation. The period of oscillation is 0.05 s and the velocity of the wave is 300 m/s. What is the phase difference between the oscillations of the two points?
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The velocity of electromagnetic radiation in a medium of permittivity ε₀ and permeability μ₀ is given by
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Two periodic waves of intensities I₁ and I₂ pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is
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Two thin lenses of focal lengths f₁ and f₂ are in contact and coaxial. The power of the combination is
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A boy is trying to start a fire by focusing Sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. The diameter of the Sun is 1.39 × 10⁹ m and its mean distance from the earth is 1.5 × 10¹¹ m. What is the diameter of the Sun's image on the paper?
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The energy required to charge a parallel plate condenser of plate separation d and plate area of cross-section A such that the uniform electric field between the plates is E, is
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A thin conducting ring of radius R is given a charge +Q. The electric field at the centre O of the ring due to the charge on the part AKB of the ring is E. The electric field at the centre due to the charge on the part ACDB of the ring is
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The electric potential at a point in free space due to a charge Q coulomb is Q × 10¹¹ volts. The electric field at that point is
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A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively with and without being short-circuited through a resistance of 10 Ω. Its internal resistance is
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A wire of a certain material is stretched slowly by ten per cent. Its new resistance and specific resistance become respectively
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In the circuit shown, the current through the 4 Ω resistor is 1 A when the points P and M are connected to a d.c. voltage source. The potential difference between the points M and N is
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An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature 20°C? The temperature of boiling water is 100°C.
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A current of 3 amp. flows through the 2 Ω resistor shown in the circuit. The power dissipated in the 5 Ω resistor is
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A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of induction . After 3 seconds the kinetic energy of the particle will be
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A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR and RQ are F₁, F₂ and F₃ respectively and are in the plane of the paper and along the directions shown, the force on the segment QP is
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A circular disc of radius 0.2 meter is placed in a uniform magnetic field of induction 1/π (Wb/m²) in such a way that its axis makes an angle of 60° with B. The magnetic flux linked with the disc is
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A galvanometer of resistance 50 Ω is connected to a battery of 3 V along with a resistance of 2950 Ω in series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be
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Curie temperature is the temperature above which
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A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with each turn of the solenoid is 4 × 10⁻³ Wb. The self-inductance of the solenoid is
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In an a.c. circuit the e.m.f. (e) and the current (i) at any instant are given respectively by e = E₀ sin ωt and i = I₀ sin(ωt − φ). The average power in the circuit over one cycle of a.c. is
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In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of
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The work function of a surface of a photosensitive material is 6.2 eV. The wavelength of the incident radiation for which the stopping potential is 5 V lies in the
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A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of 3 × 10⁶ ms⁻¹. The velocity of the particle is (mass of electron = 9.1 × 10⁻³¹ kg)
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The ground state energy of hydrogen atom is -13.6 eV. When its electron is in the first excited state, its excitation energy is
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Two radioactive materials X₁ and X₂ have decay constants 5λ and λ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X₁ to that of X₂ will be 1/e after a time
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Two nuclei have their mass numbers in the ratio 1 : 3. The ratio of their nuclear densities would be
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If M(A; Z), Mₚ and Mₙ denote the masses of the nucleus A/Z X, proton and neutron respectively in units of u (1 u = 931.5 MeV/C²) and BE represents its binding energy in MeV, then
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The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be
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The circuit shown is equivalent to
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A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly
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If uncertainty in position and momentum are equal, then uncertainty in velocity is
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If a gas expands at constant temperature, it indicates that
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The measurement of the electron position is associated with an uncertainty in momentum, which is equal to 1 × 10⁻¹⁸ g cm s⁻¹. The uncertainty in electron velocity is, (mass of an electron is 9 × 10⁻²⁸ g)
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With which one of the following elements silicon should be doped so as to give p-type semiconductor?
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