By Muhammad Faiq
ORGANIC CHEMISTRY
SECTION – 3
AROMATIC HYDROCARBONS
MULTIPLE CHOICE QUESTIONS (MCQs) with ANSWERS
1- The molecular formula of toluene is:
(a) C7H7 (b) C7H8
(c) C8H8 (d) C4H7
2- In benzene sulphonic acid, the sulphonic group is just attached with
benzene ring through:
(a) Hydrogen (b) Oxygen
(c) Sulphur (d) Carbon
3- Phenanthrene is fused polycyclic compound contains……benzene rings
(a) Two (b) Three
(c) Four (d) Five
4- Aniline is a derivative of benzene which contains
(a) Imino group (b) Amino group
(c) Amide group (d) Nitro group
5- How many π electrons are there in benzene to form the delocalized
electronic cloud?
, (a) 3 (b) 4
(c) 6 (d) 8
6- Nitration of chlorobenzene gives
(a) o - chloronitrobenzene
(b) p - chloronitrobenzene
(c) m — chloronitrobenzene
(d) a and b
7- When two or more different substituents are attached with a benzene
ring, the number one position in the ring is given to a high priority group.
Which one of the following groups has highest priority?
(a) —NH2 (b) —CH0
(c) -COOH (d) -CN
8- When a benzene is substituted by halogens only, which one of the
following halogens is given the number one position in the benzene
ring while writing the name of compound?
(a) Bromine (b) Chlorine
(c) Fluorine (d) Iodine
9- Which one of the following is not a Meta directing group?
(a) --CN (b) —OH
(c) —COOH (d) —CHO
10- The more stable the unsaturated compound ……………………..will be the
heat of hydrogenation
ORGANIC CHEMISTRY
SECTION – 3
AROMATIC HYDROCARBONS
MULTIPLE CHOICE QUESTIONS (MCQs) with ANSWERS
1- The molecular formula of toluene is:
(a) C7H7 (b) C7H8
(c) C8H8 (d) C4H7
2- In benzene sulphonic acid, the sulphonic group is just attached with
benzene ring through:
(a) Hydrogen (b) Oxygen
(c) Sulphur (d) Carbon
3- Phenanthrene is fused polycyclic compound contains……benzene rings
(a) Two (b) Three
(c) Four (d) Five
4- Aniline is a derivative of benzene which contains
(a) Imino group (b) Amino group
(c) Amide group (d) Nitro group
5- How many π electrons are there in benzene to form the delocalized
electronic cloud?
, (a) 3 (b) 4
(c) 6 (d) 8
6- Nitration of chlorobenzene gives
(a) o - chloronitrobenzene
(b) p - chloronitrobenzene
(c) m — chloronitrobenzene
(d) a and b
7- When two or more different substituents are attached with a benzene
ring, the number one position in the ring is given to a high priority group.
Which one of the following groups has highest priority?
(a) —NH2 (b) —CH0
(c) -COOH (d) -CN
8- When a benzene is substituted by halogens only, which one of the
following halogens is given the number one position in the benzene
ring while writing the name of compound?
(a) Bromine (b) Chlorine
(c) Fluorine (d) Iodine
9- Which one of the following is not a Meta directing group?
(a) --CN (b) —OH
(c) —COOH (d) —CHO
10- The more stable the unsaturated compound ……………………..will be the
heat of hydrogenation
