(A) Four double bonds
(B) Two double bonds
(C) Three double bonds
(D) One double bond
Answer: (C) Three double bonds
Category: Chemistry MCQs Class 12
Chemistry MCQs questions with answers of class 12 or second year. HSSC Part-II Chemistry multiple choice questions from past papers.
Benzene cannot undergo:
(A) Substitution reactions
(B) Addition reactions
(C) Oxidation reactions
(D) Elimination reactions
Answer: (D) Elimination reactions
Benzene cannot undergo elimination reactions.
Ethanol can be converted into ethanoic acid by:
(A) Hydration
(B) Hydrogenation
(C) Oxidation
(D) Fermentation
Answer: (C) Oxidation
Ethanol can be converted into ethanoic acid by oxidation.
The hydrofluoric acid (HF) is used to make design on glass surface this process is called:
(A) Knocking
(B) Etching
(C) Hydrogenation
(D) Supplemation
Answer: (B) Etching
The hydrofluoric acid (HF) is used to make design on glass surface this process is called etching.
The polymer bakelite is the product of formaldehyde and:
(A) Acetylene
(B) PVC
(C) Phenol
(D) Vinyl Cyanide
Answer: (C) Phenol
The polymer bakelite is the product of formaldehyde and phenol.