AIIMS Past Exam Paper Chemistry – 2011
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Question 1 of 60
Which of the following pair of transition metal ions have the same calculated values of magnetic moment?CorrectIncorrect
Question 2 of 60
A radioactive substance 88X228 (IIA) emits 3α and 3β-particloes to form ‘Y’. To which group of long form of the Periodic Table does ‘Y’ belong?CorrectIncorrect
Question 3 of 60
Which of the following is not a conjugate acid-base pair?CorrectIncorrect
Question 4 of 60
Parkinson;s disease is linked to abnormalities in the levels of dopamine in the body. The structure of dopamine isCorrectIncorrect
Question 5 of 60
The wavelength of a spectral line emitted by hydrogen atom in the Lyman series is (16/15R) cm. What is the value of n2? (R = Rydberg constant)CorrectIncorrect
Question 6 of 60
138 g ethyl alcohol is mixed with 72 g of water. The ratio of mole fraction of alcohol to water isCorrectIncorrect
Question 7 of 60
Which of the following is a biodegradable polymer?CorrectIncorrect
Question 8 of 60
Question 9 of 60
Which one of the following noble gases is used in miner’s cap lamps?CorrectIncorrect
Question 10 of 60
The following are some statements related to VA group hydrides.
I. Reducing property increases from NH3 to BiH3
II. Tendency to donate lone pair decreases from NH3 to BiH3
III. Thermal stability of hydrides decreases from NH3 to BiH3
IV. Bond angle of hydrides decreases from NH3 to BiH3
The correct statements areCorrectIncorrect
Question 11 of 60
Which of the following is not tetrahedral?CorrectIncorrect
Question 12 of 60
An organic compound ‘X’ on treatment with pyridinium chloro chromate in dichloromethane gives compound ‘Y’. Compound ‘Y’ reacts with I2 and alkali to form triiodomethane. The compound ‘X’ isCorrectIncorrect
Question 13 of 60
Which of the following is not a peroxy acid?CorrectIncorrect
Question 14 of 60
Which of the following is not correct?CorrectIncorrect
Question 15 of 60
Which one of the following species is diamagnetic in nature?CorrectIncorrect
Question 16 of 60
Aluminium oxide may be elctrolysed at 1000℃ to furnish aluminium metal (Atomic mass = 27 u; 1 F = 96500 C). The cathode reaction is
Al3+ + 3e− → Al0
To prepare 5.12 kg of aluminium metal by this method would requireCorrectIncorrect
Question 17 of 60
The solubility product of a salt having general formula MX2, ions in the aqueous solution to the salt isCorrectIncorrect
Question 18 of 60
A reaction involving two different reactants can never beCorrectIncorrect
Question 19 of 60
During the process of electrolytic refining of copper, some metals present as impurity settle as ‘anode mud’. These areCorrectIncorrect
Question 20 of 60
Based on lattice energy and other considerations, which one of the following alkali metal chlorides is expected to have the highest melting point?CorrectIncorrect
Question 21 of 60
Heating mixture of Cu2O and Cu2S will giveCorrectIncorrect
Question 22 of 60
A schematic plot of ln Keq versus inverse of temperature for a reaction is shown below.
The reaction must beCorrectIncorrect
Question 23 of 60
Calomel (Hg2Cl2) on reaction with ammonium hydroxide givesCorrectIncorrect
Question 24 of 60
The IUPAC name of the coordination compound K3[Fe(CN)6] isCorrectIncorrect
Question 25 of 60
Which of the following compounds shows optical isomerism?CorrectIncorrect
Question 26 of 60
The best reagent to convert pent-3-en-2-ol into pent-3-en-2-one isCorrectIncorrect
Question 27 of 60
Question 28 of 60
Which of the following statement in relation to the hydrogen atom is correct?CorrectIncorrect
Question 29 of 60
p-cresol reacts with chloroform in alkaline medium to give a compound A which adds hydrogen cyanide to form another compound B. This latter on acidic hydrolysis gives chiral carboxylic acid. The structure of the carboxylic acid isCorrectIncorrect
Question 30 of 60
If the bond dissociation energies of XY, X2 and Y2 (all diatomic molecules) are in the ratio of 1 : 1 : 0.5 and ∆Hf for the formation of XY is −200 kJ mol−1. The bond dissociation energy of X2 will beCorrectIncorrect
Question 31 of 60
t1/4 can be take4n as the time taken for the concentration of a reactant to drop to ¾ of its initial value. If the rate constant for a first order reaction is k, the t1/4 can be written asCorrectIncorrect
Question 32 of 60
The number of sodium atoms in 2 moles of sodium ferrocyanide isCorrectIncorrect
Question 33 of 60
In the reaction,
Ag2O + H2O2 → 2Ag + H2O + O2, H2O2 acts asCorrectIncorrect
Question 34 of 60
Which of the following is used widely in the manufacture of lead storage battery?CorrectIncorrect
Question 35 of 60
Two solutions of a substance (non electrolyte) are mixed in the following manner :
( 480 mL of 1.5 M first solution +520 mL of 1.2 M second solution.
What is the molarity of the final mixture?CorrectIncorrect
Question 36 of 60
The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution isCorrectIncorrect
Question 37 of 60
The weight of iron which will be converted into its oxide (Fe3O4) by the action of 18 g of steam on it will be (At. wt. of Fe = 56)CorrectIncorrect
Question 38 of 60
Work done during isothermal expansion of one mole of an ideal gas from 10 atm to 1 atm at 300 K isCorrectIncorrect
Question 39 of 60
When alkyl halide is heated with dry Ag2O, it producesCorrectIncorrect
Question 40 of 60
How many atoms of calcium will be deposited from a solution of CaCl2 by a current of 5 mA flowing for 60 s?CorrectIncorrect
Question 41 of 60
Direction (41-60) In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Reason ―F exerts better +mesomeric effect than―Cl.CorrectIncorrect
Question 42 of 60
Assertion Phenoxide ion on treatment with active alkyl halide (e.g., CH2 =CH―CH2Cl) gives two products viz. O-substituted and C-substituted.
Reason Phenoxide ion is an ambident nucleophile.CorrectIncorrect
Question 43 of 60
Assertion K, Rb and Cs form superoxides.
Reason The stability of the superoxides increases from ‘K’ to ‘Cs’ due to decrease in lattice energy.CorrectIncorrect
Question 44 of 60
Assertion A catalyst increases the rate of a reaction.
Reason In presence of a catalyst, the activation energy of the reaction decreases.CorrectIncorrect
Question 45 of 60
Assertion NaCl is less soluble in heavy water than in ordinary water.
Reason Dielectric constant of ordinary water is more than that of heavy water.CorrectIncorrect
Question 46 of 60
Assertion Equal moles of different substances contain same number of constituent particles.
Reason Equal weights of different substances contain the same number of constituent particles.CorrectIncorrect
Question 47 of 60
Assertion The catalytic converter in the car’s exhaust system converts polluting exhaust gases into non-toxic gases.
Reason Catalytic converter contains a mixture of transition metals and their oxides embedded in the inner support.CorrectIncorrect
Question 48 of 60
Assertion As a lead storage battery gets discharged, density of electrolyte, present in it, decreases.
Reason Lead and lead dioxide both react with sulphuric acid to form lead sulphate.CorrectIncorrect
Question 49 of 60
Assertion Atomic size of sliver is almost equal to that of gold.
Reason d-subshell has low penetration power and produce poor shielding.CorrectIncorrect
Question 50 of 60
Assertion Higher the molal depression constant of the solvent used, higher the freezing point of the solution.
Reason Depression on freezing point does not depend on the nature of the solvent.CorrectIncorrect
Question 51 of 60
Assertion The dissolution of ammonia in water does not follow Henry’s law.
Reason Ammonia undergoes ionization in water asCorrectIncorrect
Question 52 of 60
Assertion H2 molecule is more stable than HeH molecule.
Reason The anti-bonding electron in the molecule destabilise it.CorrectIncorrect
Question 53 of 60
Assertion pH of neutral solution is always 7.
Reason pH of an solution does not depend upon temperature.CorrectIncorrect
Question 54 of 60
Assertion In chemisorption, adsorption keeps on increasing with temperature.
Reason Heat keeps on providing more and more activation energy.CorrectIncorrect
Question 55 of 60
Assertion The first ionization enthalpy of Be is greater than that of B.
Reason 2p-orbital is lower in energy than 2s-orbital.CorrectIncorrect
Question 56 of 60
Assertion Nitriding is a process of heating steel in an atmosphere of nitrogen.
Reason Steel becomes brittle after nitriding.CorrectIncorrect
Question 57 of 60
Assertion Both Grignard reagent and dialkyl cadmium react with acid chlorides to form tert-alcohols.
Reason Grignard reagents are as reactive as dialkyl cadmium.CorrectIncorrect
Question 58 of 60
Assertion Methyl cyanide has higher boiling pint than methyl isocyanide.
Reason Dipole moment of methyl cyanide is higher than that of methyl isocyanide.CorrectIncorrect
Question 59 of 60
Assertion Aspirin can cause ulcer in the stomach.
Reason The ester group in aspirin gets hydrolyzed to acid group in the stomach where the pH is 2.CorrectIncorrect
Question 60 of 60
Assertion p-dichlorobenzene is less soluble in organic solvents than the corresponding o-isomer.
Reason o-dichlorobezene is polar while p –dichlorobenzene is not.CorrectIncorrect