Q.1.          An aqueous solution of compound A gives ethane on electrolysis. The compound A is

(a ) Ethyl acetate

(b) Sodium acetate

(c) Sodium propionate

(d) Sodium ethoxide.

Q.2.          Arrange the following in decreasing order of their boiling points.

  (A) n−butane    (B) 2−methylbutane

  (C) n−pentane   (D) 2, 2−dimethylpropane

(a) A > B > C > D

(b) B > C > D > A

(c) C > B > D > A

(d) D > C > B > A

Q.3.          Isopropyl bromide on Wurtz reaction gives

(a) Hexane

(b) Propane

(c) 2, 3−Dimethylbutane

(d) Neohexane

Q.4.          The correct IUPAC name of the following alkane is

(a) 3, 6−Diethyl−2−methyloctane

(b) 3−Isopropyl−6−ethyloctane

(c) 3−Ethyl−5−isopropyloctane

(d) 5−Isopropyl−3−ethyloctane

Q.5.          Which of the following has least boiling point ?

(a) n−Hexane

(b) n−Pentane

(c) 2−Methylbutane

(d) 2,2−Dimethyl propane

Q.6.          The chlorination of methane is an example of

(a) elimination reaction

(b) substitution reaction

(c) addition reaction

(d) oxidation reaction.

Q.7.          Arrange the halogens F₂, Cl₂, Br₂, I ₂, in order of their increasing reactivity with alkanes.

(a) I₂ < Br₂ < Cl₂ < F₂

(b) Br₂ < I₂ < Cl₂ < F₂

(c) Br₂ < Cl₂ < F₂ < I₂

(d) F₂ < Cl₂ < Br₂ < I₂

Q.8.          In the reaction,

 

(a) CH₃CHO

(b) CH₄

(c) C₂H₆

(d) CH₃COCH₃

Q.9.          Which of the following can exhibit geometrical isomerism ?

(a) But−2−yne

(b) But−2−ene

(c) But−1−ene

(d) Butan−2−ol

Q.10.     The compound which forms only acetaldehyde upon ozonolysis is

(a) Ethene

(b) Propyne

(c) But−1−ene

(d) But−2−ene

Q.11.     In the reaction:

 

the compound A is

(a) Ethylene

(b) Acetic acid

(c) Propene

(d) 1−Butene

Q.12.     Which of the following will not show geometrical isomerism?

Q.13.     The ozonolysis of (CH₃)₂C=C(CH₃)₂ followed by treatment with zinc and water will give

(a) acetone

(b) acetaldehyde and acetone

(c) acetic acid

(d) formaldehyde

Q.14.     Ethylene reacts with Baeyer's reagent to give

(a) glycol

(b) acetaldehyde

(c) oxalic acid

(d) ethyl alcohol

Q.15.     A gas on passing through ammoniacal AgNO₃ solution does not give any precipitate but decolourises alkaline KMnO₄ solution. The gas may be

(a) C₂H₆

(b) C₂H₄

(c) C₂H₂

(d) C₃H₈

Q.16.     When 3, 3−dimethyl−2−butanol is heated with H ₂SO₄, the major product is

(a ) 3, 3−dimethylbut−1−ene

(b) 2, 3−dimethylbut−2−ene

(c) 2, 3−dimethylbut−1−ene

(d) cis and trans isomers of 2, 3−dimethylbut−2−ene

Q.17.     Maleic acid and fumaric acid are the forms of

(a) Chain isomers

(b) Conformations

(c) Geometrical isomers

(d) Optical isomers

Q.18.     Which of the following has smallest heat of hydrogenation per mole ?

(a) But−1−ene

(b) Trans− But−2−ene

(c) Cis− But−2−ene

(d) Buta−1,3−diene

Q.19.     Reaction of HBr with propene in the presence of peroxide gives

(a) 3−Bromopropane

(b) alkyl bromide

(c) n−propyl bromide

(d) isopropyl bromide

Q.20.     Oxidation of an alkene X gives a diol; further oxidation gives a diketone. Which one of the following could be 'X' ?

(a) (CH₃)₂C=C(CH₃)₂

(b) CH₃CH=C(CH₃)₂

(c) (CH₃)₂CHCH=CH₂

(d) C₆H₅CH=CHC₆H₅

Q.21.     Ethyne adds a molecule of methyl alcohol in the presence of alkali to give

(a) Acetone

(b) Methyl vinyl ether

(c) Acetaldehyde

(d) Acetic acid

Q.22.     Which reagent can be used to distinguish between but−1−yne and but−2−yne ?

(a) alc. KOH

(b) alc. KMnO₄

(c) Br₂ water

(d) Ag⁺

Q.23.     Acetylene gas is obtained by the electrolysis of

(a) sodium fumarate

(b) sodium succinate

(c) sodium maleate

(d) both (a) and (c)

Q.24.     Arrange the following carbanions in order of their decreasing stability.

  (A) H₃C − C ≡ C ⁻  (B) H − C ≡ C ⁻    (C) H₃C – CH₂⁻

(a) B > A > C

(b) A > B > C

(c) C > A > B

(d) C > B > A

Q.25.     Which of the following will not react with ammoniacal solution of silver nitrate ?

(a) CH₃C ≡ CH

(b) (CH₃)₂CH−C ≡ CH

(c) CH₃C ≡ CCH ₃

(d) HC ≡ CH

Q.26.     In the reaction

 

Z is :

(a) CH₃CHO

(b) CH₃CH₂CH=CH₂

(c) CH₃COCH₃

(d) CH₃CH₂CHO

Q.27.     Number of acidic hydrogen atoms in but−1−yne is

(a) 1

(b) 2

(c) 3

(d) 4

Q.28.     The alkyne which will react with KMnO₄ to give pyruvic acid is

(a) Ethyne

(b) Propyne

(c) Butyne

(d) Pent−2−yne

Q.29.  

 The compound B is

(a) an acid

(b) an aldehyde

(c) ketone

(d) ethanol

Q.30.     Products of the reactions are

   

(a) CH₃COOH + CO₂

(b) CH₃COOH + HOOCCH₂CH₃

(c) CH₃CHO + CH₃CH₂CHO

(d) CH₃COOH + CH₃COCH₃

Q.31.     In benzene, each carbon atom undergoes

(a) sp

(b) sp²

(c) sp³

(d) sp² and sp³ hybridisation

Q.32.     Benzene reacts with C₆H₅COCl in the presence of anhydrous AlCl₃ to give

(a) toluene

(b) naphthalene

(c) acetophenone

(d) benzophenone

Q.33.     The number of π−bonds in naphthalene is

(a) 5

(b) 6

(c) 3

(d) 4

Q.34.     Benzene molecule has

(a) 6 a and 6 1t bonds

(b) 16 a and 6 1t bonds

(c) 12 a and 3 1t bonds

(d) 6 a and 3 1t bonds.

Q.35.     Benzene reacts with acetyl chloride in the presence of AlCl₃ to give

(a) acetophenone

(b) toluene

(c) benzophenone

(d) ethyl benzene.

Q.36.     An aromatic compound X, C₇H₇Cl on oxidation gives an aromatic compound Y. The soda−lime decarboxylation of Y gives benzene. X is

(a) o−chlorotoluene

(b) p−chlorotoluene

(c) benzyl chloride

(d) m−chlorotoluene

Q.37.     Which of the following is less reactive than benzene towards electrophilic substitution reactions ?

(a) Nitrobenzene

(b) Aniline

(c) Bromo benzene

(d) Chlorobenzene

Q.38.     In the reaction,

  C₆H₆ + RCOCl  C₆H₅COR + HCl

the attacking electrophilic is

(a) AlCl₂⁺

(b) R⁺

(c) RCO⁺

(d) AlCl₄

Q.39.     n−Propyl chloride and benzene react in the presence of anhydrous AlCl ₃ to form.

(a) ethyl benzene

(b) methyl benzene

(c) n−propyl benzene

(d) iso− propyl benzene

Q.40.     The attacking reagent in electrophilic sulphonation of benzene is

(a) SO₄²⁻

(b) SO₃²⁻

(c) SO₂

(d) SO₃

Q.41.     Benzene can be converted into acetophenone by treating it with

(a) Acetone in the presence of HCl

(b) Acetyl chloride in the presence of AlCl₃

(c) Methyl chloride in the presence of AlCl₃

(d) Acetaldehyde in the presence of Fe

Q.42.     Which of the following is not o− and p−directing group ?

(a) −Cl

(b) −NH₂

(c) −CH₃

(d) −NO₂

Q.43.     Which of the following does not obey Huckel rule ?

Q.44.     In Friedel Craft reaction, anhydrous AlCl₃ is used. Its function is to

(a) absorb HCl

(b) absorb H₂O

(c) produce electrophile

(d) produce nucleophile

Q.45.     The electrophile in nitration of benzene reaction is

(a) NO₂

(b) NO₂⁻

(c) NO₂⁺

(d) NO

 

 

Answers