BITSAT Chemistry Haloalkanes and Haloarenes MCQs

Question: An aromatic compound has molecular formula C₇H₇Br. Give the possible isomers and the appropriate method to distinguish them

a) 3 isomers; by heating with AgNO₃ solution

b) 4 isomers; by treating with AgNO₃ solution

c) 4 isomers; by oxidation

d) 5 isomers; by oxidation

Answer: 4 isomers; by oxidation

Question: The boiling point of alkyl halide are higher than those of corresponding alkanes because of

a) Dipole-dipole interaction

b) Dipole-induced dipole interaction

c) H-bonding

d) None of the above

Answer: Dipole-dipole interaction

Question: The number of double bonds in gammexane is :

a) 0

b) 1

c) 2

d) 3

Answer: 0

Question: DDT is prepared by reacting chlorobenzene with

a) CHCl₃ 

b) CCl₃CHO

c) CCl₄

d) C₂H₆

Answer: CCl₃CHO

Question: In a SN² substitution reaction of the type 

which one of the following has the highest relative rate ?

a) CH₃ – CH₂ – CH₂Br

b)

c)

d) CH₃CH₂Br

Answer: CH₃CH₂Br

Question: The alkyl halide is converted into alcohol by :

a) Elimination

b) Halogenation

c) Addition

d) Substitution

Answer: Substitution

Question: A is an optically inactive alkyl chloride which on reaction with aqueous KOH gives B. B on heating with Cu at 300°C gives an alkene C, what are A and C

a) CH₃CH₂Cl, CH₂ = CH₂

b) Me₃CCl, MeCH = CH.Me

c) Me₃CCl, Me₂ C =CH₂

d) Me₂ CH.CH₂ Cl, Me₂ C =CH₂

Answer: Me₃CCl, Me₂ C =CH₂

Question: In which of the following conversions, phosphorus pentachloride is used as the reagent?

a) H₂C = CH₂→ CH₃CH₂Cl

b) CH₃CH₂OH→ CH₃CH₂Cl

c) H₃C-O- CH₃ → CH₃Cl

d) CH ≡ CH → CH₂ = CHCl

Answer: CH₃CH₂OH→ CH₃CH₂Cl

Question: Which of the following order is not correct ?

a)

b)

c)

d)

Answer:

Question: Which of the following will give vinyl chloride ?

a)

b)

c)

d) All

Answer: All

Question: The following reaction proceeds through the intermediate

RCOOAg + Br₂ → + CO₂ + AgBr

a) RCOO•

b) R•

c) Br•

d) All

Answer: All

Question: Function of AlCl₃ in Friedel-Craft’s reaction is to

a) Produce nucleophile

b) Make new bond

c) Produce electrophile

d) Break bond

Answer: Produce electrophile

Question: When CH₃CH₂Br reacts with sodium acetylide, the main product is

a) 1-butane

b) 1-butyne

c) 1-butene

d) 3-butane

Answer: 1-butyne

Question: The alkyl halide is converted into alcohol by :

a) Elimination

b) Halogenation

c) Addition

d) Substitution

Answer: Substitution

Question: The number of double bonds in gammexane is :

a) 0

b) 1

c) 2

d) 3

Answer: 0