JEE Main, AIPMT MCQs Set 21

Sr. No.

Question

Answer

1.

The monomers of Buna-S rubber are

(A) vinyl chloride and sulphur

(B) butadiene

(C) styrene and butadiene

(D) isoprene and butadiene

Answer: (C)

2.

The noble gas mixture is cooled in a coconut bulb at 173 K. The gases that are not adsorbed are

(A) He and Ne

(B) Ar and Kr

(C) He and Xe

(D) Ne and Xe

Answer: (A)

3.

Which one of the following shows functional isomerism?

(A) CH₂Cl₂

(B) C₂H₅OH

(C) C₃H₆

(D) C₂H₄

Answer: (B)

4.

The number of disulphide linkages present in insulin are

(A) 1

(B) 2

(C) 3

(D) 4

Answer: (B)

5.

The number of gram molecules of chlorine in 6.02 × 10²⁵ hydrogen chloride molecules is

(A) 5

(B) 50

(C) 100

(D) 10

Answer: (B)

6.

The number of nodal planes present in σ * s antibonding orbitals is

(A) 1

(B) 2

(C) 0

(D) 3

Answer: (A)

7.

The number of unidentate ligands in the complex ion is called

(A) EAN

(B) Coordination number

(C) primary valency

(D) oxidation number

Answer: (B)

8.

The one which has least Iodine value is

(A) Ghee

(B) Groundnut oil

(C) Sunflower oil

(D) Ginger oil

Answer: (A)

9.

The order of stability of metal oxides is

(A) Fe₂O₃ < Cr₂O₃ < AIZO3 < MgO

(B) Fe₂O₃ < Al₂O₃ < Cr₂O₃ < MgO

(C) Al₂O₃ < MgO < Fe₂O₃< Cr₂O₃

(D) Cr₂O₃ < MgO < Al₂O₃ < Fe₂O₃

Answer: (A)

10.

Which one of the following statement is no true?

(A) Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant

(B) pH of drinking water should be between 5.5 – 9.5

(C) Concentration of DO below 6 ppm is good for the growth of fish

(D) Clean water would have a BOD value of less than 5 ppm

Answer: (C)