1. Which household chemical is commonly used as a disinfectant?
A) Sugar
B) Bleach
C) Salt
D) Starch
Answer: B) Bleach
2. The chemical name of baking soda is:
A) Sodium chloride
B) Sodium carbonate
C) Sodium bicarbonate
D) Calcium carbonate
Answer: C) Sodium bicarbonate
3. Vinegar mainly contains which acid?
A) Citric acid
B) Acetic acid
C) Hydrochloric acid
D) Sulfuric acid
Answer: B) Acetic acid
4. Which chemical is commonly used to remove hard water stains?
A) Ammonia
B) Acetic acid
C) Sodium hydroxide
D) Potassium nitrate
Answer: B) Acetic acid
5. Household bleach mainly contains:
A) Sodium hypochlorite
B) Sodium nitrate
C) Sodium sulfate
D) Sodium bromide
Answer: A) Sodium hypochlorite
6. Which gas is released when bleach is mixed with acids?
A) Oxygen
B) Hydrogen
C) Chlorine
D) Nitrogen
Answer: C) Chlorine
7. Washing soda is chemically known as:
A) Sodium chloride
B) Sodium carbonate
C) Sodium bicarbonate
D) Calcium oxide
Answer: B) Sodium carbonate
8. Which chemical is used in soaps to remove grease?
A) Acids
B) Bases
C) Salts
D) Sugars
Answer: B) Bases
9. Ammonia solution is commonly used as a:
A) Fertilizer
B) Fuel
C) Glass cleaner
D) Preservative
Answer: C) Glass cleaner
10. Which household chemical is used to unclog drains?
A) Sodium hydroxide
B) Sodium chloride
C) Ethanol
D) Glycerin
Answer: A) Sodium hydroxide
11. The pleasant smell in perfumes is due to:
A) Esters
B) Salts
C) Metals
D) Bases
Answer: A) Esters
12. Which chemical is used in toothpaste to prevent cavities?
A) Chlorine
B) Fluoride
C) Nitrogen
D) Iodine
Answer: B) Fluoride
13. Detergents differ from soaps because they:
A) Do not form lather
B) Work better in hard water
C) Are always acidic
D) Are natural products
Answer: B) Work better in hard water
14. Which household chemical is used as an antiseptic?
A) Hydrogen peroxide
B) Sodium chloride
C) Carbon dioxide
D) Methane
Answer: A) Hydrogen peroxide
15. The chemical formula of common salt is:
A) Na₂CO₃
B) NaCl
C) NaOH
D) HCl
Answer: B) NaCl
16. Which substance is used in mothballs to repel insects?
A) Naphthalene
B) Ethanol
C) Glucose
D) Acetone
Answer: A) Naphthalene
17. Which acid is found in lemon juice and used for cleaning?
A) Acetic acid
B) Citric acid
C) Formic acid
D) Carbonic acid
Answer: B) Citric acid
18. Hand sanitizers mainly contain:
A) Methanol
B) Ethanol or isopropyl alcohol
C) Kerosene
D) Acetic acid
Answer: B) Ethanol or isopropyl alcohol
19. Which chemical is responsible for the foaming action in soaps?
A) Surfactants
B) Metals
C) Sugars
D) Proteins
Answer: A) Surfactants
20. Which household chemical is used as a fabric whitener?
A) Starch
B) Bleach
C) Oil
D) Wax
Answer: B) Bleach
21. Air fresheners often contain:
A) Acids
B) Esters
C) Salts
D) Bases
Answer: B) Esters
22. Which chemical is used in batteries commonly found at home?
A) Sulfuric acid
B) Nitric acid
C) Acetic acid
D) Carbonic acid
Answer: A) Sulfuric acid
23. Which compound is commonly used in antacids?
A) Sodium chloride
B) Magnesium hydroxide
C) Ethanol
D) Methane
Answer: B) Magnesium hydroxide
24. Which gas is used in carbonated drinks?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Hydrogen
Answer: C) Carbon dioxide
25. Which chemical is used to polish furniture?
A) Wax
B) Acid
C) Salt
D) Bleach
Answer: A) Wax
26. Which household chemical helps remove nail polish?
A) Acetone
B) Vinegar
C) Soap
D) Sugar
Answer: A) Acetone
27. Which chemical is added to water to kill germs?
A) Fluoride
B) Chlorine
C) Nitrogen
D) Helium
Answer: B) Chlorine
28. Which substance is commonly used as a preservative in food?
A) Sodium benzoate
B) Sodium chloride
C) Sodium hydroxide
D) Sodium sulfate
Answer: A) Sodium benzoate
29. Which chemical is used in fire extinguishers?
A) Carbon dioxide
B) Oxygen
C) Nitrogen
D) Hydrogen
Answer: A) Carbon dioxide
30. Which household chemical is used to soften water?
A) Sodium carbonate
B) Sodium chloride
C) Acetic acid
D) Ammonium nitrate
Answer: A) Sodium carbonate