CBSE _NCERT 7th Chemistry: MCQ:Acid base and salt: For Olympiads
Multiple-Choice Questions: Acid base and salt |
1. The word acid comes from the Latin word ‘ acere ‘ which means |
a) Sweet |
b) Salty |
c) Neutral |
d) Sour |
2. Substances which are bitter in taste, feel soapy on touching are known as |
a) Acids |
b) Bases |
c) Indicators |
d) Neutral solution |
3. Special type of substances used to test whether a substance is acidic/basic are known as |
a) Indicators |
b) Acids |
c) Bases |
d) Salt |
4. Some naturally occurring indicators are |
(a). Turmeric |
(b) Litmus |
©. China rose |
(d). All the above |
5.The most commonly used natural indicator’ Litmus’ is extracted from |
(a).Lichens |
(b). Turmeric |
©. Indicators |
(d). China rose |
6. Litmus is available in the form of |
(a). Litmus paper |
(b) Lichens |
© Indicator |
(d). China rose |
7. Neutral solutions which do not change the colour of either red/blue litmus are known as |
(a).Neutral solutions |
(b) Acid solutions |
©. Basic solutions |
(d). Neither acidic nor basic |
8. Acetic acid is found in |
(a).Curd |
(b). Spinach |
© Citrus fruits |
(d). Vinegar |
9. Formic acid is found in |
a). Curd |
(b). Spinach |
©. Ant’s sting |
(d) Ascorbic acid |
10. Citric acid is found in |
(a). Curd |
(b). Citrus fruits |
©. Ascorbic acid |
(d). Lime water |
11. Lactic acid is found in |
(a). Curd |
(b).Citrus fruits |
©.Gooseberry |
(d)Lime |
12. Oxalic acid is found in |
a) Spinach |
b) Curd |
c) Oranges |
d) Unripe mangoes |
13. Ascorbic acid is found in |
(a). Amla & Citrus fruits |
(b) Curd |
©. Oranges & lemon |
(d).Unripe mangoes |
14. Tartaric acid is found in |
(a). Tamarind |
(b) Grapes |
© unripe mangoes |
(d)All of the above |
15. Calcium hydroxide is found in |
Calcium carbonate |
Calcium chloride |
Calcium |
Lime water |
16. Ammonium hydroxide is found |
(a).Window cleaner |
(b).Detergents |
(c) Soap |
(d). Milk of magnesia |
17. Sodium hydroxide is found in |
a) Soap |
b) Window cleaner |
c) Calcium hydroxide |
d) Sodium |
18. Potassium hydroxide is found in |
(a). Soap |
(b). Window cleaner |
(c) Potassium |
(d)Potassium chlorate |
19. Magnesium hydroxide is found in |
(a). Milk of magnesia |
(b).Magnesium chloride |
(c) Magnesium ribbon |
(d) Magnesium hydroxide |
20.Which of the following salts is basic in nature? |
(a) NH4NO3 |
(b) Na2CO3 |
(c) Na2SO4 |
(d) NaCl |
Answer |
1. D 2 b 3. A 4. D 5. A 6. A 7. A 8. d |
9. C 10. b 11. A 12. A 13. A 14. D 15. d 16. A |
17. A 18. A 19.a 20 B |
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