AIPMT 2009 · Chemistry

AIPMT 2009 Chemistry Questions with Solutions

The AIPMT 2009 paper had 49 Chemistry questions from 21 chapters.

Chemical Bonding and Molecular Structure and Hydrocarbons had the most questions (5 each), followed by Chemical Kinetics with 4.

5 questions below have the answer and explanation free; the other 44 are in Premium.

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Chemistry questions: 49
Chapters covered: 21
Solved free here: 5 of 49
Easy / Medium / Hard: 10 / 24 / 15

Difficulty is NEET MIND's own tag for each question.

Chapter-wise: AIPMT 2009 Chemistry

How many questions each chapter had in AIPMT 2009. Open a chapter for its questions from every year.

All 49 AIPMT 2009 Chemistry questions

In paper order. Try each one, then open the answer where it is shown.

Question 1 (AIPMT 2009, Q47)
Solid StateMedium
Sodium has body centred packing. Distance between two nearest atoms is $3.7\,\AA$ . The lattice parameter is:
1. Option A: $8.6\,\AA$
2. Option B: $6.8\,\AA$
3. Option C: $4.3\,\AA$
4. Option D: $3.0\,\AA$
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Question 2 (AIPMT 2009, Q51)
Some Basic Concepts of ChemistryEasy
10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be:
1. Option A: 1 mol
2. Option B: 2 mol
3. Option C: 3 mol
4. Option D: 4 mol
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Question 3 (AIPMT 2009, Q52)
Redox ReactionsEasy
Oxidation number of P in $PO_4^{3-}$ , of S in $SO_4^{2-}$ and that of Cr in $Cr_2O_7^{2-}$ are respectively:
1. Option A: $+3$ , $+6$ and $+6$
2. Option B: $+5$ , $+6$ and $+6$
3. Option C: $+3$ , $+6$ and $+5$
4. Option D: $+5$ , $+3$ and $+6$
Show answer & explanationHide answer & explanation
Correct answer: (B) $+5$ , $+6$ and $+6$
Explanation
Using oxidation number rules: For $PO_4^{3-}$ → $P = +5$ For $SO_4^{2-}$ → $S = +6$ For $Cr_2O_7^{2-}$ → $Cr = +6$
Question 4 (AIPMT 2009, Q53)
Structure of AtomMedium
Maximum number of electrons in a subshell of an atom is determined by the following:
1. Option A: $2n^2$
2. Option B: $4l+2$
3. Option C: $2l+2$
4. Option D: $4l-2$
The answer and explanation for this question are in NEET MIND Premium.
Question 5 (AIPMT 2009, Q54)
Structure of AtomMedium
Which of the following is not permissible arrangement of electrons in an atom?
1. Option A: $n=3,\; l=2,\; m=-3,\; s=-\frac{1}{2}$
2. Option B: $n=4,\; l=0,\; m=0,\; s=-\frac{1}{2}$
3. Option C: $n=5,\; l=3,\; m=0,\; s=+\frac{1}{2}$
4. Option D: $n=3,\; l=2,\; m=-3,\; s=-\frac{1}{2}$
The answer and explanation for this question are in NEET MIND Premium.
Question 6 (AIPMT 2009, Q55)
ThermodynamicsMedium
From the following bond energies: H–H bond energy = $431.37\;\text{kJ mol}^{-1}$ C=C bond energy = $606.10\;\text{kJ mol}^{-1}$ C–C bond energy = $336.49\;\text{kJ mol}^{-1}$ C–H bond energy = $410.50\;\text{kJ mol}^{-1}$ Enthalpy for the reaction:
1. Option A: $553.0\;\text{kJ mol}^{-1}$
2. Option B: $1523.6\;\text{kJ mol}^{-1}$
3. Option C: $-243.6\;\text{kJ mol}^{-1}$
4. Option D: $-120.0\;\text{kJ mol}^{-1}$
The answer and explanation for this question are in NEET MIND Premium.
Question 7 (AIPMT 2009, Q56)
EquilibriumMedium
The ionization constant of ammonium hydroxide is $1.77 \times 10^{-5}$ at $298\,K$ . Hydrolysis constant of ammonium chloride is:
1. Option A: $5.65 \times 10^{-12}$
2. Option B: $5.65 \times 10^{-10}$
3. Option C: $6.50 \times 10^{-12}$
4. Option D: $5.65 \times 10^{-13}$
The answer and explanation for this question are in NEET MIND Premium.
Question 8 (AIPMT 2009, Q57)
ElectrochemistryHard
Given: (i) $\mathrm{Cu^{2+} + 2e^- \rightarrow Cu},\; E^\circ = 0.337\,V$ (ii) $\mathrm{Cu^{2+} + e^- \rightarrow Cu^+},\; E^\circ = 0.153\,V$ The electrode potential $E^\circ$ for the reaction: $\mathrm{Cu^+ + e^- \rightarrow Cu}$ will be:
1. Option A: $0.38\,V$
2. Option B: $0.52\,V$
3. Option C: $0.90\,V$
4. Option D: $0.30\,V$
The answer and explanation for this question are in NEET MIND Premium.
Question 9 (AIPMT 2009, Q58)
Some Basic Concepts of ChemistryMedium
What is the $[OH^-]$ in the final solution prepared by mixing $20.0\,mL$ of $0.050\,M$ HCl with $30.0\,mL$ of $0.10\,M$ $Ba(OH)_2$ ?
1. Option A: $0.12\,M$
2. Option B: $0.10\,M$
3. Option C: $0.40\,M$
4. Option D: $0.0050\,M$
The answer and explanation for this question are in NEET MIND Premium.
Question 10 (AIPMT 2009, Q59)
ThermodynamicsMedium
The energy absorbed by each molecule $(A_2)$ of a substance is $4.4 \times 10^{-19}\,J$ and bond energy per molecule is $4.0 \times 10^{-19}\,J$ . The kinetic energy of the molecule per atom will be:
1. Option A: $4.0 \times 10^{-20}\,J$
2. Option B: $2.0 \times 10^{-20}\,J$
3. Option C: $2.2 \times 10^{-19}\,J$
4. Option D: $4.0 \times 10^{-19}\,J$
The answer and explanation for this question are in NEET MIND Premium.
Question 11 (AIPMT 2009, Q60)
Chemical KineticsMedium
For the reaction: $\mathrm{N_2 + 3H_2 \rightarrow 2NH_3}$ If $\frac{d[NH_3]}{dt} = 2 \times 10^{-4}\;mol\;L^{-1}\;s^{-1}$ The value of $-\frac{d[H_2]}{dt}$ will be:
1. Option A: $1 \times 10^{-4}\;mol\;L^{-1}\;s^{-1}$
2. Option B: $3 \times 10^{-4}\;mol\;L^{-1}\;s^{-1}$
3. Option C: $4 \times 10^{-4}\;mol\;L^{-1}\;s^{-1}$
4. Option D: $6 \times 10^{-4}\;mol\;L^{-1}\;s^{-1}$
The answer and explanation for this question are in NEET MIND Premium.
Question 12 (AIPMT 2009, Q61)
Chemical KineticsHard
For the reaction $A + B \rightarrow$ products, it is observed that: (1) On doubling the initial concentration of $A$ only, the rate of reaction is also doubled. (2) On doubling the initial concentration of both $A$ and $B$ , there is a change by a factor of $8$ in the rate of the reaction. The rate law of this reaction is:
1. Option A: $rate = k[A][B]$
2. Option B: $rate = k[A]^2[B]$
3. Option C: $rate = k[A][B]^2$
4. Option D: $rate = k[A]^2[B]^2$
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Question 13 (AIPMT 2009, Q62)
ElectrochemistryHard
The equivalent conductance of $\dfrac{M}{32}$ solution of a weak monobasic acid is $8.0\;mho\;cm^2$ and at infinite dilution is $400\;mho\;cm^2$ . The dissociation constant of this acid is:
1. Option A: $1.25 \times 10^{-4}$
2. Option B: $1.25 \times 10^{-5}$
3. Option C: $1.25 \times 10^{-6}$
4. Option D: $6.25 \times 10^{-4}$
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Question 14 (AIPMT 2009, Q63)
SolutionsHard
A $0.0020\,M$ aqueous solution of an ionic compound $Co(NH_3)_5(NO_2)Cl$ freezes at $-0.00732^\circ C$ . Number of moles of ions which $1$ mole of ionic compound produces on being dissolved in water will be: ( $k_f$ = 1.86 °C/m)
1. Option A: 1
2. Option B: 2
3. Option C: 3
4. Option D: 4
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Question 15 (AIPMT 2009, Q64)
Chemical KineticsMedium
In the reaction: $\mathrm{BrO_3^- (aq) + 5Br^- (aq) + 6H^+ \rightarrow 3Br_2(l) + 3H_2O(l)}$ The rate of appearance of bromine Br₂ is related to rate of disappearance of bromide ions as follows:
1. Option A: $\dfrac{d(Br_2)}{dt}=\dfrac{3}{5}\dfrac{d(Br^-)}{dt}$
2. Option B: $\dfrac{d(Br_2)}{dt}=-\dfrac{3}{5}\dfrac{d(Br^-)}{dt}$
3. Option C: $\dfrac{d(Br_2)}{dt}=-\dfrac{5}{3}\dfrac{d(Br^-)}{dt}$
4. Option D: $\dfrac{d(Br_2)}{dt}=\dfrac{5}{3}\dfrac{d(Br^-)}{dt}$
The answer and explanation for this question are in NEET MIND Premium.
Question 16 (AIPMT 2009, Q65)
Solid StateMedium
Lithium metal crystallizes in a body centred cubic crystal. If the length of the side of the unit cell of lithium is $351\,pm$ , the atomic radius of lithium will be:
1. Option A: $300.5\,pm$
2. Option B: $240.8\,pm$
3. Option C: $151.8\,pm$
4. Option D: $75.5\,pm$
The answer and explanation for this question are in NEET MIND Premium.
Question 17 (AIPMT 2009, Q66)
EquilibriumHard
The dissociation constants of acetic acid and HCN at $25^\circ C$ are $1.5 \times 10^{-5}$ and $4.5 \times 10^{-10}$ respectively. The equilibrium constant for: $\mathrm{CN^- + CH_3COOH \rightleftharpoons HCN + CH_3COO^-}$ would be:
1. Option A: $3.0 \times 10^{4}$
2. Option B: $3.0 \times 10^{5}$
3. Option C: $3.0 \times 10^{-5}$
4. Option D: $3.0 \times 10^{-4}$
The answer and explanation for this question are in NEET MIND Premium.
Question 18 (AIPMT 2009, Q67)
ThermodynamicsMedium
The values of $\Delta H$ and $\Delta S$ for the reaction: $\mathrm{C(graphite) + CO_2(g) \rightarrow 2CO(g)}$ are 170 kJ and 170 J K⁻¹ respectively. This reaction will be spontaneous at:
1. Option A: $510\,K$
2. Option B: $710\,K$
3. Option C: $910\,K$
4. Option D: $1110\,K$
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Question 19 (AIPMT 2009, Q68)
Chemical KineticsMedium
Half-life period of a first-order reaction is $1386\,s$ . The specific rate constant of the reaction is:
1. Option A: $5.0 \times 10^{-2}\,s^{-1}$
2. Option B: $5.0 \times 10^{-3}\,s^{-1}$
3. Option C: $0.5 \times 10^{-2}\,s^{-1}$
4. Option D: $0.5 \times 10^{-3}\,s^{-1}$
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Question 20 (AIPMT 2009, Q69)
Chemical Bonding and Molecular StructureMedium
In which of the following molecules / ions $BF_3$ , $NO_2^-$ , $NH_2^-$ and $H_2O$ , the central atom is $sp^2$ hybridized?
1. Option A: $BF_3$ and $NO_2^-$
2. Option B: $NO_2^-$ and $NH_2$
3. Option C: $NH_2^-$ and $H_2O$
4. Option D: $NO_2^-$ and $H_2O$
The answer and explanation for this question are in NEET MIND Premium.
Question 21 (AIPMT 2009, Q70)
Redox ReactionsEasy
Among the following which is the strongest oxidizing agent?
1. Option A: $Cl_2$
2. Option B: $F_2$
3. Option C: $Br_2$
4. Option D: $I_2$
Show answer & explanationHide answer & explanation
Correct answer: (B) $F_2$
Explanation
Fluorine has the highest standard reduction potential among halogens and therefore is the strongest oxidizing agent. Hence option (B) is correct.
Question 22 (AIPMT 2009, Q71)
Chemical Bonding and Molecular StructureHard
According to MO theory which of the following lists ranks the nitrogen species in terms of increasing bond order?
1. Option A: $N_2^- < N_2^{2-} < N_2$
2. Option B: $N_2^- < N_2 < N_2^{2-}$
3. Option C: $N_2^{2-} < N_2^- < N_2$
4. Option D: $N_2 < N_2^{2-} < N_2^-$
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Question 23 (AIPMT 2009, Q72)
Chemical Bonding and Molecular StructureMedium
In the case of alkali metals, the covalent character decreases in order:
1. Option A: $MI > MBr > MCl > MF$
2. Option B: $MCl > MI > MBr > MF$
3. Option C: $MF > MCl > MBr > MI$
4. Option D: $MF > MCl > MI > MBr$
The answer and explanation for this question are in NEET MIND Premium.
Question 24 (AIPMT 2009, Q73)
Chemical Bonding and Molecular StructureEasy
Which of the following oxides is not expected to react with sodium hydroxide?
1. Option A: $BeO$
2. Option B: $B_2O_3$
3. Option C: $CaO$
4. Option D: $SiO_2$
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Question 25 (AIPMT 2009, Q74)
ElectrochemistryHard
$Al_2O_3$ is reduced by electrolysis at low potentials and high currents. If $4.0 \times 10^4$ amperes of current is passed through molten $Al_2O_3$ for $6$ hours, what mass of aluminium is produced? (Assume $100\%$ current efficiency, atomic mass of $Al = 27\,g\,mol^{-1}$ )
1. Option A: $1.3 \times 10^4\,g$
2. Option B: $9.0 \times 10^3\,g$
3. Option C: $8.1 \times 10^4\,g$
4. Option D: $2.4 \times 10^5\,g$
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Question 26 (AIPMT 2009, Q75)
The d- and f-Block ElementsMedium
The stability of $+1$ oxidation state increases in the sequence:
1. Option A: $Ga < In < Al < Tl$
2. Option B: $Al < Ga < In < Tl$
3. Option C: $Tl < In < Ga < Al$
4. Option D: $In < Tl < Ga < Al$
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Question 27 (AIPMT 2009, Q76)
Solid StateMedium
Copper crystallizes in a face-centred cubic lattice with a unit cell length of $361\,pm$ . What is the radius of copper atom in pm?
1. Option A: $108$
2. Option B: $128$
3. Option C: $157$
4. Option D: $181$
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Question 28 (AIPMT 2009, Q77)
Alcohols, Phenols and EthersEasy
What is the dominant intermolecular force or bond that must be overcome in converting liquid $CH_3OH$ to a gas?
1. Option A: London dispersion force
2. Option B: Hydrogen bonding
3. Option C: Dipole-dipole interaction
4. Option D: Covalent bonds
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Question 29 (AIPMT 2009, Q78)
Coordination CompoundsHard
Which of the following complex ions is expected to absorb visible light? (At no. Zn = 30, Sc = 21, Ti = 22, Cr = 24)
1. Option A: $[Zn(NH_3)_6]^{2+}$
2. Option B: $[Sc(H_2O)_3(NH_3)_3]^{3+}$
3. Option C: $[Ti(en)_2(NH_3)_2]^{4+}$
4. Option D: $[Cr(NH_3)_6]^{3+}$
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Question 30 (AIPMT 2009, Q79)
Coordination CompoundsHard
Out of $TiF_6^{2-}$ and $CoF_6^{3-}$ , $Cu_2Cl_2$ and $NiCl_4^{2-}$ $(Z$ of $Ti=22$ , $Co=27$ , $Cu=29$ , $Ni=28)$ the colourless species are:
1. Option A: $CoF_6^{3-}$ and $NiCl_4^{2-}$
2. Option B: $TiF_6^{2-}$ and $CoF_6^{3-}$
3. Option C: $Cu_2Cl_2$ and $NiCl_4^{2-}$
4. Option D: $TiF_6^{2-}$ and $Cu_2Cl_2$
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Question 31 (AIPMT 2009, Q80)
Coordination CompoundsHard
Which of the following does not show optical isomerism? $(en =$ ethylenediamine $)$
1. Option A: $[Co(en)_3]^{3+}$
2. Option B: $[Co(en)_2Cl_2]^+$
3. Option C: $[Co(NH_3)_3Cl_3]^0$
4. Option D: $[Co(en)Cl_2(NH_3)_2]^+$
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Question 32 (AIPMT 2009, Q81)
The d- and f-Block ElementsMedium
Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?
1. Option A: $3d^2 4s^2$
2. Option B: $3d^3 4s^2$
3. Option C: $3d^5 4s^1$
4. Option D: $3d^5 4s^2$
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Question 33 (AIPMT 2009, Q82)
Chemical Bonding and Molecular StructureEasy
Which of the following molecules acts as a Lewis acid?
1. Option A: $(CH_3)_3N$
2. Option B: $(CH_3)_3B$
3. Option C: $(CH_3)_2O$
4. Option D: $(CH_3)_3P$
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Question 34 (AIPMT 2009, Q83)
Classification of Elements and Periodicity in PropertiesMedium
Amongst the elements with the following electronic configurations, which one of them may have the highest ionization energy?
1. Option A: $[Ne]3s^2 3p^1$
2. Option B: $[Ne]3s^2 3p^3$
3. Option C: $[Ne]3s^2 3p^2$
4. Option D: $[Ar]3d^{10}4s^2 4p^3$
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Question 35 (AIPMT 2009, Q84)
PolymersMedium
The straight chain polymer is formed by:
1. Option A: hydrolysis of $(CH_3)_2SiCl_2$ followed by condensation polymerization
2. Option B: hydrolysis of $(CH_3)_3SiCl$ followed by condensation polymerization
3. Option C: hydrolysis of $CH_3SiCl_3$ followed by condensation polymerization
4. Option D: hydrolysis of $(CH_3)_4Si$ followed by addition polymerization
Show answer & explanationHide answer & explanation
Correct answer: (A) hydrolysis of $(CH_3)_2SiCl_2$ followed by condensation polymerization
Explanation
Hydrolysis of dimethyldichlorosilane forms silanediol, which on condensation polymerization gives linear silicone polymers: $[-Si(CH_3)_2-O-]_n$ Hence option (A) is correct.
Question 36 (AIPMT 2009, Q85)
Organic Chemistry: Some Basic Principles and TechniquesMedium
The IUPAC name of the compound having the formula $CH \equiv C-CH=CH_2$ is:
1. Option A: 1-butene-3-yne
2. Option B: 3-buten-1-yne
3. Option C: 1-butyn-3-ene
4. Option D: but-1-yn-3-ene
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Question 37 (AIPMT 2009, Q86)
HydrocarbonsEasy
Which of the following compounds will exhibit cis-trans (geometrical) isomerism?
1. Option A: 1-Butanol
2. Option B: 2-Butene
3. Option C: 2-Butanol
4. Option D: 2-Butyne
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Question 38 (AIPMT 2009, Q87)
Alcohols, Phenols and EthersHard
H₂COH.CH₂OH on heating with periodic acid gives:
1. Option A: Option 1
2. Option B: Option 2
3. Option C: Option 3
4. Option D: Option 4
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Question 39 (AIPMT 2009, Q88)
Haloalkanes and HaloarenesMedium
Consider the following reaction: The product Z is :
1. Option A: $CH_3CH_2OH$
2. Option B: $CH_2 = CH_2$
3. Option C: $CH_3CH_2-O-CH_2CH_3$
4. Option D: $CH_3CH_2-O-SO_3H$
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Question 40 (AIPMT 2009, Q89)
HydrocarbonsEasy
Benzene reacts with $CH_3Cl$ in the presence of anhydrous $AlCl_3$ to form:
1. Option A: Xylene
2. Option B: Toluene
3. Option C: Chlorobenzene
4. Option D: Benzyl chloride
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Question 41 (AIPMT 2009, Q90)
HydrocarbonsMedium
Nitrobenzene can be prepared from benzene by using a mixture of concentrated $HNO_3$ and concentrated $H_2SO_4$ . In the mixture, nitric acid acts as a/an:
1. Option A: catalyst
2. Option B: reducing agent
3. Option C: acid
4. Option D: base
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Question 42 (AIPMT 2009, Q91)
Haloalkanes and HaloarenesEasy
Which of the following reactions is an example of nucleophilic substitution reaction?
1. Option A: $RX + Mg \rightarrow RMgX$
2. Option B: $RX + KOH \rightarrow ROH + KX$
3. Option C: $2RX + 2Na \rightarrow R-R + 2NaX$
4. Option D: $RX + H_2 \rightarrow RH + HX$
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Question 43 (AIPMT 2009, Q92)
BiomoleculesEasy
Which one of the following is employed as a tranquilizer?
1. Option A: Chlorpheniramine
2. Option B: Equanil
3. Option C: Naproxen
4. Option D: Tetracycline
Show answer & explanationHide answer & explanation
Correct answer: (B) Equanil
Explanation
Equanil (meprobamate) is used as a tranquilizer. Chlorpheniramine is an antihistamine, Naproxen is an analgesic, and Tetracycline is an antibiotic. Hence option (B) is correct.
Question 44 (AIPMT 2009, Q93)
BiomoleculesMedium
Structures of some common polymers are given. Which one is not correctly presented?
1. Option A: Option 1
2. Option B: Option 2
3. Option C: Option 3
4. Option D: Option 4
Show answer & explanationHide answer & explanation
Correct answer: (C) Option 3
Explanation
Terylene (PET) repeating unit is: $[-O-CH_2-CH_2-O-CO-C_6H_4-CO-]_n$ The structure given in option (D) is not correctly represented. Hence option (D) is correct.
Question 45 (AIPMT 2009, Q94)
AminesHard
Predict the product:
1. Option A: Option 1
2. Option B: Option 2
3. Option C: Option 3
4. Option D: Option 4
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Question 46 (AIPMT 2009, Q95)
Aldehydes, Ketones and Carboxylic AcidsHard
Propionic acid with $Br_2/P$ yields a dibromo product. Its structure would be:
1. Option A: Option 1
2. Option B: Option 2
3. Option C: Option 3
4. Option D: Option 4
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Question 47 (AIPMT 2009, Q96)
HydrocarbonsMedium
Trichloroacetaldehyde $(CCl_3CHO)$ reacts with chlorobenzene in presence of sulphuric acid and produces:
1. Option A: Option 1
2. Option B: Option 2
3. Option C: Option 3
4. Option D: Option 4
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Question 48 (AIPMT 2009, Q97)
HydrocarbonsHard
Consider the following reaction: The product $Z$ is:
1. Option A: Benzene
2. Option B: Toluene
3. Option C: Benzaldehyde
4. Option D: Benzoic acid
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Question 49 (AIPMT 2009, Q98)
Organic Chemistry: Some Basic Principles and TechniquesHard
The state of hybridization of $C_2$ , $C_3$ , $C_5$ and $C_6$ of the hydrocarbon shown below is:
1. Option A: $sp,\; sp^2,\; sp^3,\; sp^2$
2. Option B: $sp,\; sp^3,\; sp^2,\; sp^3$
3. Option C: $sp^3,\; sp^2,\; sp^2,\; sp$
4. Option D: $sp,\; sp^2,\; sp^2,\; sp^3$
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