objective questions set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

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

Question : 2

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 : 3

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 : 4

Assertion (A) :
The main constituent of the liquefied petroleum gas is methane.
Reason (R) :
Methane can be used directly for burning in homes and factories where it can be supplied through pipelines.

a) Both A and R are true but R is not the correct explanation of A

b) A is true but R is false

c) Both A and R are true and R is the correct explanation of A

d) A is false but R is true

Question : 5

The characteristic odour of garlic is due to

a) a sulphur compound

b) a fluorine compound

c) a chloro compound

d) acetic acid

Question : 6

The order of appearance of the following with increasing temperature during the refining of crude oil is _____________ .

a) Gasoline, kerosene, diesel

b) Kerosene, gasoline, diesel

c) Diesel, gasoline, kerosene

d) Gasoline, diesel, kerosene