objective questions set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

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 : 2

Match List-I with List-II :

a) 4 3 2 1

b) 1 2 3 4

c) 4 3 1 2

d) 3 4 2 1

Question : 3

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

a) 3

b) 2

c) 1

d) 5

Question : 4

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 : 5

Which is a general formula of alkenes?

a) C_nH_2n–2

b) C_nH_2n

c) C_nH_2n+2

d) None of these

Question : 6

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