JEE Chemistry Chemistry In Everyday Life MCQs Set 13

Answer: (c) Antipyretic (and analgesic)

Explanation:
1. Aspirin is the acetyl derivative of salicylic acid.
2. It lowers fever and relieves mild pain; it also thins the blood.

Teacher's Note:
1. Recall the standard fact.
2. Aspirin is the acetyl derivative of salicylic acid.

Answer: (d) Antiseptic

Explanation:
1. Bithionol kills or stops the growth of skin microbes and is applied to living tissue.
2. Such substances are antiseptics.

Teacher's Note:
1. Recall the standard fact.
2. Bithionol kills or stops the growth of skin microbes and is applied to living tissue.

Answer: (b) Analgesic and antipyretic

Explanation:
1. Novalgin (analgin) relieves pain and reduces fever.
2. It is not an antimicrobial agent.

Teacher's Note:
1. Recall the standard fact.
2. Novalgin (analgin) relieves pain and reduces fever.

Answer: (a) Novalgin

Explanation:
1. Chloromycetin, penicillin and streptomycin are antibiotics.
2. Novalgin relieves pain.

Teacher's Note:
1. Recall the standard fact.
2. Chloromycetin, penicillin and streptomycin are antibiotics.

Answer: (d) Sucralose

Explanation:
1. Three OH groups of sucrose are replaced by Cl atoms, giving sucralose.
2. It is about 600 times sweeter than sugar and is stable during cooking.

Teacher's Note:
1. Recall the standard fact.
2. Three OH groups of sucrose are replaced by Cl atoms, giving sucralose.

Answer: (a) An anionic detergent

Explanation:
1. The long hydrophobic chain carries a negatively charged sulphate head group.
2. Cetyltrimethylammonium bromide is the cationic type.

Teacher's Note:
1. Recall the standard fact.
2. The long hydrophobic chain carries a negatively charged sulphate head group.

Answer: (c) An unbranched hydrocarbon chain

Explanation:
1. Micro-organisms can break down straight chains easily.
2. Branched chains resist degradation and cause foam in water bodies.

Teacher's Note:
1. Recall the standard fact.
2. Micro-organisms can break down straight chains easily.

Answer: (d) It makes the stomach alkaline and can increase acid secretion

Explanation:
1. \( \ce{NaHCO3} \) neutralises the acid but excess makes the stomach alkaline.
2. The stomach then releases even more acid.

Teacher's Note:
1. Recall the standard fact.
2. \( \ce{NaHCO3} \) neutralises the acid but excess makes the stomach alkaline.

Answer: (b) Bactericidal

Explanation:
1. Penicillin and ofloxacin kill the bacteria.
2. Bacteriostatic drugs (such as tetracycline) only inhibit their growth.

Teacher's Note:
1. Recall the standard fact.
2. Penicillin and ofloxacin kill the bacteria.

Answer: (a) Sodium benzoate

Explanation:
1. Sodium benzoate and salts of sorbic and propanoic acid prevent the growth of microbes in food.
2. The others are a sweetener, an antacid and a detergent.

Teacher's Note:
1. Recall the standard fact.
2. Sodium benzoate and salts of sorbic and propanoic acid prevent the growth of microbes in food.

Answer: (d) An antiseptic

Explanation:
1. A 0.2 percent solution of phenol is mild enough to use on living tissue.
2. A 1 percent solution is a disinfectant used on floors and instruments.

Teacher's Note:
1. Recall the standard fact.
2. A 0.2 percent solution of phenol is mild enough to use on living tissue.

Answer: (b) Strong antiseptic

Explanation:
1. It is applied on wounds to kill bacteria.

Teacher's Note:
1. Recall the standard fact.
2. It is applied on wounds to kill bacteria.