JEE Main, NEET MCQs Set 27

Sr. No.

Question

Answer

1.

Which of the two ions from the list given below that have the geometry that is explained by the same hybridization of orbitals, ?

(A)  and

(B)  and

(C)  and

(D)  SCN^– and

Answer: (B)

2.

Which one of the following conformations of cyclohexane is the least stable?

(A) Boat

(B) Half-chair

(C) Chair

(D) Twisted-boat

Answer: (B)

3.

Which one of the following conversions involve change in both hybridization and shape?

(A) NH₃ → NH

(B) CH₄ → C₂H₆

(C) H₂O → H₃O⁺

(D) BF₃ → BF

Answer: (D)

4.

Which one of the following does NOT involve coagulation?

(A) Peptization

(B) Formation of delta regions

(C) Clotting of blood by the use of ferric chloride

(D) Treatment of drinking water by potash alum

Answer: (A)

5.

Which one of the following forms propanenitrile as the major product?

(A) Propyl bromide + alcoholic KCN

(B) Ethyl bromide + alcoholic KCN

(C) Ethyl bromide + alcoholic AgCN

(D) Propyl bromide + alcoholic AgCN

Answer: (B)

6.

Which one of the following has maximum number of atoms of oxygen?

(A) 2 g of water

(B) 2 g of sulphur dioxide

(C) 2 g of carbon dioxide

(D) 2 g of carbon monoxide.

Answer: (A)

7.

Which one of the following is a molecular crystal?

(A) Quartz

(B) Rock salt

(C) Diamond

(D) Dry ice

Answer: (D)

8.

Which one of the following is a second order reaction?

(A) CH₃COOCH₃ + NaOH → CH₃COONa + H₂O

(B) H₂ + Cl₂  2HCl

(C) NH₄NO₃ → N₂ + 3H₂O

(D) H₂ + Br₂ → 2HBr

Answer: (A)

9.

Which one of the following is an example for homogeneous catalysis?

(A) Manufacture of ammonia by Haber’s process

(B) Manufacture of sulphuric acid by contact process

(C) Hydrogenation of oil

(D) Hydrolysis of sucrose in presence of dilute hydrochloric acid

Answer: (D)

10.

Which one of the following is employed as Antithistamine?

(A) Omeprazole

(B) Chloramphenicol

(C) Diphenyl hydramine

(D) Norothindrone

Answer: (C)