Time Left:
600
sec
1. Which of the following tastes sour?
A. Bases
B. Acids
C. Salts
D. Metals
2. Which of the following turns red litmus blue?
A. Acids
B. Bases
C. Salts
D. Metals
3. Which of the following turns blue litmus red?
A. Bases
B. Metals
C. Acids
D. Salts
4. Which of the following is an acid?
A. NaOH
B. KOH
C. HCl
D. Ca(OH)₂
5. Which of the following is a base?
A. NaCl
B. H₂SO₄
C. NaOH
D. CO₂
6. What does acid produce in aqueous solution?
A. Hydroxide ions
B. Hydrogen ions
C. Sodium ions
D. Oxygen ions
7. What does base produce in aqueous solution?
A. H⁺ ions
B. OH⁻ ions
C. Na⁺ ions
D. Cl⁻ ions
8. Which of the following is used to test acids and bases?
A. Metals
B. Litmus
C. Oxygen
D. Hydrogen
9. Which of the following is a natural indicator?
A. Phenolphthalein
B. Methyl orange
C. Litmus
D. Universal indicator
10. Which of the following is a synthetic indicator?
A. Turmeric
B. Red cabbage juice
C. Litmus
D. Phenolphthalein
11. What is the colour of phenolphthalein in acidic solution?
A. Red
B. Pink
C. Colourless
D. Yellow
12. What is the colour of phenolphthalein in basic solution?
A. Pink
B. Colourless
C. Yellow
D. Red
13. What is the colour of methyl orange in acid?
A. Pink
B. Yellow
C. Red
D. Blue
14. What is the colour of methyl orange in base?
A. Red
B. Yellow
C. Pink
D. Colourless
15. What is the colour of turmeric in base?
A. Red
B. Yellow
C. Pink
D. Blue
16. Which acid is found in lemon?
A. Acetic acid
B. Hydrochloric acid
C. Citric acid
D. Sulphuric acid
17. Which acid is found in vinegar?
A. Acetic acid
B. Citric acid
C. Oxalic acid
D. Hydrochloric acid
18. Which acid is found in tomato?
A. Formic acid
B. Oxalic acid
C. Acetic acid
D. Nitric acid
19. Which acid is secreted in the stomach?
A. Sulphuric acid
B. Nitric acid
C. Hydrochloric acid
D. Phosphoric acid
20. Which acid is found in curd?
A. Oxalic acid
B. Acetic acid
C. Lactic acid
D. Citric acid
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