AIIMS Past Exam Paper Chemistry-2013
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Question 1 of 60
Aspirin acts as an analgesic because itCorrectIncorrect
Question 2 of 60
Starch is a mixture of two components, a water soluble component amylase (15-20%) and a water insoluble component amylopectin (80-85%). The aqueous solution of amylase gives a blue colour with iodine solution due to the formation ofCorrectIncorrect
Question 3 of 60
What reagent is used in the Hinsberg test of amines?CorrectIncorrect
Question 4 of 60
Aldol condensation between which of the following two compounds followed by dehydration gives methyl vinyl ketone?CorrectIncorrect
Question 5 of 60
Grignard reagents and organolithium compounds on addition to dry ice separately, followed by hydrolysis givesCorrectIncorrect
Question 6 of 60
The strongest acid among the following isCorrectIncorrect
Question 7 of 60
On commercial scale phenol is obtained from chlorobenzene. The chlorobenzene needed for the purpose is prepared by
Raschig’s process. Which one of the following is Raschig’s process?CorrectIncorrect
Question 8 of 60
Question 9 of 60
At 300 K, 36 g of glucose present per litre in its solution has an osmotic pressure of 4.98 bar. If the osmotic pressure of solution is 1.52 bar at the same temperature, what would be its concentration?CorrectIncorrect
Question 10 of 60
The composition of a sample of wustite is Fe0.93O. What percentage of the iron is present in the form of Fe(III)?CorrectIncorrect
Question 11 of 60
When acidified K2Cr2O7 solution is added to Sn2+ salts, then Sn2+ changes toCorrectIncorrect
Question 12 of 60
What would be the expected product of the reaction of propyne with Br2/H2O if the mechanism of this reaction is analogous to that of propene?CorrectIncorrect
Question 13 of 60
Which of the following carbocation would have the greatest stability?CorrectIncorrect
Question 14 of 60
Electron affinity is positive, whenCorrectIncorrect
Question 15 of 60
Which one of the following pairs represents stereoisomerism?CorrectIncorrect
Question 16 of 60
Question 17 of 60
EMF of Daniell cell was found using different concentrations of Zn2+ ions and Cu2+ ion. A graph was then plotted between Ecell and The plot was found to be linear with intercept on Ecell axis equal to 1.10 V. Ecell for Zn/ZnCorrectIncorrect
Question 18 of 60
Which of the following process is not responsible for the presence of electric charge on the sol particles?CorrectIncorrect
Question 19 of 60
In the metallurgy of aluminiumCorrectIncorrect
Question 20 of 60
In the preparation of HNO3 we get NO gas by catalytic oxidation of ammonia. The moles of NO produced by the oxidation of two moles of NH3 will beCorrectIncorrect
Question 21 of 60
The reaction of P4 with X leads selectively to P4O6. The X isCorrectIncorrect
Question 22 of 60
Which one of the following reactions of xenon compounds are not feasible?CorrectIncorrect
Question 23 of 60
The thermal decomposition of HCOOH is a first order reaction with a rate constant of 2.4 × 10−3 s−1at certain temperature. Calculate how long will it take for three fourths of initial quantity of HCOOH to decompose?CorrectIncorrect
Question 24 of 60
Rate constant k of a reaction varies with temperature according to the equation where, Ea is the energy of activation for the reaction. When a graph is plotted for log k us a straight line with a slope −6670 k is obtained. The activation energy for t his reaction will be (R = 8.314 JK−1 mol−1).CorrectIncorrect
Question 25 of 60
Which of the following statements is not correct about order of a reaction?CorrectIncorrect
Question 26 of 60
Which of the following reagents would not be a good choice for reducing an aryl nitro compound to an amine?CorrectIncorrect
Question 27 of 60
Which is the correct statement about birth control pills?CorrectIncorrect
Question 28 of 60
Question 29 of 60
Glycogen is a branched chain polymer of α-D-glucose units in which chain is formed by C1-C4glycosidic linkage whereas branching occurs by the formation of C1-C6 glycosidic linkage. Structure of glycogen is similar toCorrectIncorrect
Question 30 of 60
Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to beCorrectIncorrect
Question 31 of 60
The anticodon transfer RNA for the messenger RNA codon GCA isCorrectIncorrect
Question 32 of 60
Which one of the following statements is wrong?CorrectIncorrect
Question 33 of 60
The enthalpies of all elements in their standard states areCorrectIncorrect
Question 34 of 60
2 L of an ideal gas at a pressure of 10 atm expands isothermally into a vacuum until its total volume is 10 L. How much work is done in the expansion?CorrectIncorrect
Question 35 of 60
Predict in which of the following entropy decreases.CorrectIncorrect
Question 36 of 60
The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 isCorrectIncorrect
Question 37 of 60
Question 38 of 60
The shape of the orbital with the value of l = 2, m = 0 isCorrectIncorrect
Question 39 of 60
For the reaction, 1 g mole of CaCO3 is enclosed in 5 L container
CaCO3(s) → CaO(s) + CO2(g)
Kp = 1.16 at 1073 K then per cent dissociation of CaCO3 isCorrectIncorrect
Question 40 of 60
Ionic product of Ni(OH)2 is 2.0 × 10−15. Molar solubility of Ni(OH)2 in 0.10 M NaOH will beCorrectIncorrect
Question 41 of 60
Directions (Q. Nos. 41 to 60) In the following questions a statement of assertion followed by a statement of reason is given.
Assertion Neoprene can be further hardened by heating in presence of sulphur.
Reason Neoprene contains allylic double bonds which help in introducing sulphur bridges between different polymer chains.CorrectIncorrect
Question 42 of 60
Assertion Deoxyribose, C5H10O4 is not a carbohydrate.
Reason Carbohydrates are hydrates of carbon so compounds which follow Cx(H2O)y formula are carbohydrates.CorrectIncorrect
Question 43 of 60
Assertion Aniline does not undergo Friedel-Crafts reaction.
Reason Friedel-Crafts is an electrophilic substitution reaction.CorrectIncorrect
Question 44 of 60
Assertion In comparison to ethyl chloride it is difficult to carry out nucleophilic substitution on vinyl chloride.
Reason Vinyl group is electron donating.CorrectIncorrect
Question 45 of 60
Assertion Phenol forms 2, 4, 6-tribromophenol on treatment with Br2 in carbon disulphide at 273 K
Reason Bromine polarizes in carbon disulphide.CorrectIncorrect
Question 46 of 60
Assertion On cooling, the brown colour of nitrogen dioxide disappears.
Reason On cooling, NO2 undergoes dimerisation resulting in the pairing of odd electron of NO2.CorrectIncorrect
Question 47 of 60
Assertion Na+ and Al3+ are isoelectronic but the magnitude of ionic radius of Al3+ is less than that of Na+.
Reason The magnitude of effective nuclear charge of the outer shell electrons in Al3+ is greater than that in Na+.CorrectIncorrect
Question 48 of 60
Assertion Cp – Cv = R, for an ideal gas.
Reason R is the work done when temperature of one mole of an ideal gas is increased by 1°.CorrectIncorrect
Question 49 of 60
Assertion On addition of NH4Cl to NH4OH solution, pH decreases but remains greater than 7.CorrectIncorrect
Question 50 of 60
Assertion The mobility of sodium ion is lower than that of potassium ion.
Reason The ionic mobilities depend on the effective radius of the ion.CorrectIncorrect
Question 51 of 60
Assertion On adding zinc pieces to aqueous FeCl3 solution, colour changes from deep yellow to light green.
Reason Aqueous FeCl3 is acidic and on adding Zn, nascent hydrogen is produced which reduces deep yellow FeCl3 solution to light green FeCl2 solution.CorrectIncorrect
Question 52 of 60
Assertion p-chlorobenzoic acid is stronger acid than benzoic acid.
Reason Chlorine has electron donating resonance (+R) effect.CorrectIncorrect
Question 53 of 60
Assertion A free radical is paramagnetic species.
Reason A free radical is formed in hemolytic fission of covalent bond.CorrectIncorrect
Question 54 of 60
Assertion Addition of one equivalent of HCl to 1, 3-butadiene at 80℃ gives 3-chloro-1-butene as major product.
Reason 3-chloro-1-butene is a kinetically controlled product.CorrectIncorrect
Question 55 of 60
Assertion Semiconductors are solids with conductivities in the intermediate range from 10−6-104ohm−1 m−1
Reason Intermediate conductivity in semiconductor is due to partially filled valence bandCorrectIncorrect
Question 56 of 60
Assertion When methanol is added to water boiling pint of water increases.
Reason When a volatile solute is added to a volatile solvent, elevation in boiling point is observed.CorrectIncorrect
Question 57 of 60
Assertion The Daniell cell becomes dead after some time.
Reason Oxidation potential of zinc anode decreases and that of copper increasesCorrectIncorrect
Question 58 of 60
Assertion The highest oxidation state of Os is +8.
Reason Osmum is a 5 d-block element.CorrectIncorrect
Question 59 of 60
Assertion Toxic metal ions are removed by the chelating ligands.
Reason Chelate complexes tend to be more stable.CorrectIncorrect
Question 60 of 60
Assertion Formic acid reduces Tollen’s reagent.
Reason Compounds containing ―CHO group reduce Tollen’s reagent.CorrectIncorrect