objective questions set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

How many different isomers are possible for a hydrocarbon with the molecular formula C₄H₁₀?

a) 3

b) 2

c) 1

d) 5

Question : 2

Pentane has the molecular formula C₅H₁₂. It has

a) 16 covalent bonds

b) 12 covalent bonds

c) 5 covalent bonds

d) 17 covalent bonds

Question : 3

The heteroatoms present in CH₃ — CH₂ — O — CH₂— CH₂ Cl are

1. Oxygen
2. Carbon
3. Hydrogen
4. Chlorine

a) (iii) and (iv)

b) (ii) and (iii)

c) (i) and (ii)

d) (i) and (iv)

Question : 4

Which of the following are true statements?

1. α-Carbon of α-amino acid is asymmetric.
2. All proteins are found in L-form.
3. Human body can synthesize all proteins they need.
4. At pH = 7 both amino and carboxylic groups exist in ionised form.

a) 1, 2 and 4

b) 1, 2 and 3

c) 1, 3 and 4

d) 2, 3 and 4

Question : 5

Which of the following are examples of addition polymers?

1. Polystyrene
2. Nylon
3. PVC
4. Polypropylene

a) 1, 2 and 4

b) 1, 2 and 3

c) 1, 3 and 4

d) 2, 3 and 4

Question : 6

Two adjacent members of a homologous series have :

a) same general methods of preparation

b) a difference of 14 a.m.u. in molecular mass

c) a difference of –CH₂ in their structure

d) all of the above