Class 12 Chemistry MCQ – Chemistry in Everyday Life

1. Which of the following is an antiseptic?

a) Phenol
b) Aspirin
c) Paracetamol
d) Sodium bicarbonate

Answer:

a) Phenol

Explanation:

Phenol has antiseptic properties and is used to disinfect wounds.

2. Which component gives the spicy flavor to chili peppers?

a) Curcumin
b) Capsaicin
c) Caffeine
d) Quinine

Answer:

b) Capsaicin

Explanation:

Capsaicin gives the spicy flavor to chili peppers.

3. Which of the following is an artificial sweetener?

a) Sucrose
b) Glucose
c) Aspartame
d) Maltose

Answer:

c) Aspartame

Explanation:

Aspartame is an artificial sweetener used in various food products.

4. Which compound is primarily responsible for the aroma of vanilla?

a) Vanillin
b) Eugenol
c) Limonene
d) Linalool

Answer:

a) Vanillin

Explanation:

Vanillin is the primary component responsible for the aroma of vanilla.

5. The active ingredient in common antacids is:

a) Acetylsalicylic acid
b) Sodium bicarbonate
c) Methanol
d) Ethanol

Answer:

b) Sodium bicarbonate

Explanation:

Sodium bicarbonate neutralizes stomach acid, hence is used in antacids.

6. Which compound is used as a preservative in pickles?

a) Sodium benzoate
b) Sodium chloride
c) Sodium acetate
d) Sodium hydroxide

Answer:

a) Sodium benzoate

Explanation:

Sodium benzoate is used as a preservative in pickles and other acidic foods.

7. The main component of common table salt is:

a) Sodium chloride
b) Potassium chloride
c) Calcium carbonate
d) Magnesium sulfate

Answer:

a) Sodium chloride

Explanation:

Common table salt primarily consists of sodium chloride.

8. Which compound in coffee acts as a stimulant?

a) Caffeine
b) Capsaicin
c) Curcumin
d) Quinine

Answer:

a) Caffeine

Explanation:

Caffeine acts as a stimulant and is the main active compound in coffee.

9. Which of the following is a tranquilizer?

a) Paracetamol
b) Aspirin
c) Barbiturates
d) Penicillin

Answer:

c) Barbiturates

Explanation:

Barbiturates are a class of drugs that act as central nervous system depressants, and can therefore produce a wide spectrum of effects, from mild sedation to total anesthesia.

10. The main component of hair conditioners is:

a) Surfactants
b) Cationic detergents
c) Soaps
d) Anionic detergents

Answer:

b) Cationic detergents

Explanation:

Cationic detergents are used in hair conditioners to give a smooth texture to the hair.

11. Which of the following is NOT an antibiotic?

a) Penicillin
b) Streptomycin
c) Paracetamol
d) Tetracycline

Answer:

c) Paracetamol

Explanation:

Paracetamol is an analgesic and antipyretic but not an antibiotic.

12. The main component of mothballs is:

a) Naphthalene
b) Benzene
c) Toluene
d) Methane

Answer:

a) Naphthalene

Explanation:

Mothballs primarily consist of naphthalene which acts as a repellent.

13. Which compound is commonly used as an antiseptic in mouthwashes?

a) Ethanol
b) Methanol
c) Chlorhexidine
d) Benzaldehyde

Answer:

c) Chlorhexidine

Explanation:

Chlorhexidine has antiseptic properties and is used in many mouthwashes.

14. Ascorbic acid is another name for:

a) Vitamin A
b) Vitamin B
c) Vitamin C
d) Vitamin D

Answer:

c) Vitamin C

Explanation:

Ascorbic acid is the chemical name for Vitamin C.

15. Which of the following is used as a food preservative?

a) Citric acid
b) Nitric acid
c) Sulfuric acid
d) Benzoic acid

Answer:

d) Benzoic acid

Explanation:

Benzoic acid and its salts are used as a food preservative.

16. Which compound is responsible for the hot taste of ginger?

a) Gingerol
b) Capsaicin
c) Curcumin
d) Eugenol

Answer:

a) Gingerol

Explanation:

Gingerol gives the hot and spicy flavor to ginger.

17. Which of the following is an antipyretic drug?

a) Morphine
b) Paracetamol
c) Cocaine
d) Insulin

Answer:

b) Paracetamol

Explanation:

Paracetamol is used to reduce fever and is known as an antipyretic drug.

18. The main component of vinegar is:

a) Citric acid
b) Acetic acid
c) Tartaric acid
d) Malic acid

Answer:

b) Acetic acid

Explanation:

Vinegar primarily consists of acetic acid which gives it its characteristic taste.

19. Which compound is commonly used as a painkiller?

a) Paracetamol
b) Sodium bicarbonate
c) Caffeine
d) Sodium benzoate

Answer:

a) Paracetamol

Explanation:

Paracetamol is a common over-the-counter painkiller.

20. The sweet substance found in honey is:

a) Sucrose
b) Glucose
c) Maltose
d) Fructose

Answer:

d) Fructose

Explanation:

Honey contains a significant amount of fructose, which gives it its sweet taste.

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