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