MSc Chemistry MCQs

Chemistry MCQs

(i) Which of the following substituent deactivates benzene ring and is o, p-directing?
(a) __ NH2
(b) __ Cl
(c) __ OCH3
(d) __ OH

(ii) Which of the following is most readily nitrated?
(a) Toluene
(b) Benzaldehyde
(c) Nitrobenzene
(d) Benzoic Acid

(iii) Ketones can be prepared by reaction of Grignard reagent with:
(a) Acid Amides
(b) Acid Chloride
(c ) Carboxylic Acid
(d) Epoxides

(iv) Which of the following statements about the order of reaction is true?
(a) The order of a reaction can only be determined by experiment.
(b) A second order reaction is also bimolecular
(c) The order of reaction must be a positive integer
(d) The order of reaction increases with increasing temperature.

(v) Polysaccharides yield many monosaccharides on:
(a) Hydration
(b) Oxidation
(c) Reduction
(d) Hydrolysis

(vi) Which of the following is not aromatic?
(a) Benzene
(b) cyclooctatetraene
(c) Pyridine
(d) Phenol

(vii) Which of the following is most basic?
(a) H2O
(b) NH3
(c) CH3 NH2
(d) CH3OH

(viii) Which of the following has lowest pH?
(d) Cl3C COOH

(ix) The equilibrium of two readily interconvertible isomers is called:
(a) Stereoisomerism
(b) Metamerism
(c) Tautomerism
(d) Polymorphism

(x) Which of the following compounds exhibit geometrical isomerism?
(a) 1-Pentene
(b) 2-Pentene
(c) 2-methyl –2-Pentene
(d) 2-methyl –2-Butene

(xi) Which of the following gives a tertiary alcohol when treated with Grignard reagent:
(a) HCHO
(b) CH3CHO
(c) C3H5CHO
(d) CH3COCH3

(xii) Which of the following tests is not used to identify aldehydes?
(a) Tollen’s test
(b) Benedict solution test
(c) Fehling solution test
(d) Ammonia test

(xiii) Which is incorrect about alkaloids?
(a) Naturally Occuring
(b) Possess a hetrocyclic ring
(c) Exhibit biological action
(d) acidic in nature

(xiv) Which of the followings will not give iodoform test:
(a) Acetone
(b) Ethylacohol
(c) Benzaldehyde
(d) Acetaldehyde

(xv) The reaction of aniline with bromine water gives:
(a) o-bromoaniline
(b) p-bromoaniline
(c) 2,4-dibromoaniline
(d) 2,4,6-tribromoaniline

(xvi) The reaction of tripalmitin, with sodium hydroxide is called:
(a) Hydrolysis
(b) Saponification
(c) Esterification
(d) Combustion

(xvii) Which one is not Petrochemical?
(a) Napthalene
(b) Mineral Oil
(c) Wax
(d) Table Salt

(xviii) Chemical adsorption:
(a) is exothermic
(b) is irreversible
(c) takes place at high temp.
(d) All of these

(xix) The most commonly used absorbent for chromatographic separation of organic compound is:
(a) Activated charcoal
(b) Fuller’s Earth
(c) Alumina
(d) Silica gel

(xx) Grignard reagent is:
(a) Organo Zinc halide
(b) Organo cadmium bromide
(c) n-Butyl Lithium
(d) Organo Magnesium halide

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