Chemistry in Everyday Life MCQs in Everyday Science
1. What is the primary purpose of using baking soda in cooking?
a) To act as a sweetener
b) To enhance color
c) To act as a leavening agent
d) To add flavor
Answer: c) To act as a leavening agent
2. What type of bond is present in a water molecule (H₂O)?
a) Ionic bond
b) Covalent bond
c) Metallic bond
d) Hydrogen bond
Answer: b) Covalent bond
3. Which chemical is commonly used as a disinfectant in household cleaning products?
a) Sodium chloride
b) Hydrogen peroxide
c) Acetic acid
d) Ethanol
Answer: b) Hydrogen peroxide
4. What is the main ingredient in vinegar?
a) Lactic acid
b) Acetic acid
c) Citric acid
d) Sulfuric acid
Answer: b) Acetic acid
5. What is the chemical formula for table salt?
a) Na₂CO₃
b) NaCl
c) KCl
d) MgSO₄
Answer: b) NaCl
6. Which compound is used to make soap and is formed from the reaction of a fat or oil with a base?
a) Ester
b) Soap
c) Saponification
d) Detergent
Answer: c) Saponification
7. What is the primary chemical component of most household bleach products?
a) Sodium chloride
b) Sodium hydroxide
c) Sodium hypochlorite
d) Potassium permanganate
Answer: c) Sodium hypochlorite
8. What gas is commonly used in carbonated beverages to provide fizz?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen
Answer: c) Carbon dioxide
9. Which of the following is a common acid found in citrus fruits?
a) Ascorbic acid
b) Hydrochloric acid
c) Sulfuric acid
d) Phosphoric acid
Answer: a) Ascorbic acid
10. What is the purpose of adding salt to water when cooking pasta?
a) To increase the boiling point of water
b) To make the water boil faster
c) To prevent pasta from sticking
d) To enhance the flavor of the pasta
Answer: a) To increase the boiling point of water
11. What is the chemical process called when an iron object rusts?
a) Reduction
b) Oxidation
c) Precipitation
d) Condensation
Answer: b) Oxidation
12. What common household product contains citric acid?
a) Lemon juice
b) Vinegar
c) Bleach
d) Ammonia
Answer: a) Lemon juice
13. Which chemical compound is used as a preservative in many processed foods?
a) Sodium bicarbonate
b) Sodium nitrate
c) Sodium chloride
d) Sodium hydroxide
Answer: b) Sodium nitrate
14. What is the primary function of antioxidants in foods?
a) To preserve color
b) To enhance flavor
c) To prevent spoilage
d) To neutralize free radicals
Answer: d) To neutralize free radicals
15. Which type of chemical reaction occurs when cooking an egg?
a) Physical change
b) Chemical change
c) Neutralization
d) Precipitation
Answer: b) Chemical change