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1. What is formed when HCl reacts with NaOH?
A. NaCl + H₂O
B. H₂ + Cl₂
C. Na₂O + H₂O
D. Na + Cl₂
2. The reaction between acid and base is called:
A. Displacement reaction
B. Combination reaction
C. Neutralisation reaction
D. Oxidation reaction
3. Which of the following is called caustic soda?
A. NaOH
B. KOH
C. Ca(OH)₂
D. Mg(OH)₂
4. Which of the following is called caustic potash?
A. NaOH
B. KOH
C. Ca(OH)₂
D. Mg(OH)₂
5. Which of the following is slaked lime?
A. CaCO₃
B. CaO
C. Ca(OH)₂
D. CaSO₄
6. Which gas is released when acids react with metals?
A. Oxygen
B. Hydrogen
C. Nitrogen
D. Carbon dioxide
7. Which gas is released when acids react with carbonates?
A. Oxygen
B. Hydrogen
C. Nitrogen
D. Carbon dioxide
8. What is the product of Na₂CO₃ + 2HCl?
A. NaCl + H₂O + CO₂
B. NaOH + Cl₂
C. Na₂O + HCl
D. NaHCO₃ + H₂
9. What is formed when Ca(OH)₂ reacts with CO₂?
A. CaCO₃ + H₂O
B. CaCl₂ + H₂O
C. CaSO₄ + H₂O
D. CaO + H₂O
10. Which substance is used to test CO₂ gas in labs?
A. NaOH
B. Lime water
C. HCl
D. Ammonia
11. Which salt is used in baking powder?
A. Na₂CO₃
B. NaHCO₃
C. NaCl
D. K₂CO₃
12. What is the chemical name of washing soda?
A. Sodium carbonate
B. Sodium bicarbonate
C. Sodium chloride
D. Calcium carbonate
13. What is the chemical name of bleaching powder?
A. Calcium hydroxide
B. Calcium oxychloride
C. Calcium carbonate
D. Calcium chloride
14. Which chemical is used in manufacture of glass and soap?
A. NaHCO₃
B. Na₂CO₃
C. NaCl
D. Ca(OH)₂
15. Which acid is formed when SO₂ dissolves in water?
A. HNO₃
B. H₂SO₃
C. H₂SO₄
D. HCl
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