Class 7 Science MCQ Chapter 5 Acids, Bases and Salts Solutions in English Medium, Class 7 Science Multiple Choice Question Answer in English to each chapter is provided in the list so that you can easily browse throughout different chapters Class 7 Science MCQ Chapter 5 Acids, Bases and Salts Notes and select need one.
Class 7 Science MCQ Chapter 5 Acids, Bases and Salts
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Acids, Bases and Salts
Chapter – 5
| MCQ |
1. Which of the following solutions is neutral?
(a) Vinegar.
(b) Lemon juice.
(c) Milk of magnesia.
(d) Sugar solution.
Answer: (d) Sugar solution.
2. Acids:
(a) give substances a sour taste
(b) give substances a bitter taste
(c) give substances a sweet taste
(d) none of the above
Ans: (a) Give substances a sour taste.
3. What taste do acids typically have?
(a) Sweet.
(b) Bitter.
(c) Sour.
(d) Salty.
Ans: (c) Sour.
4. Bases are bitter to taste and are also:
(a) Rough to touch.
(b) Soapy to touch.
(c) Sour in taste.
(d) Used as indicators.
Ans: (b) Soapy to touch.
5. What taste do bases typically have?
(a) Sweet.
(b) Bitter.
(c) Sour.
(d) Salty.
Ans: (b) Bitter.
6. An example of a natural indicator is:
(a) litmus
(b) methyl orange
(c) phenolphthalein
(d) All of the above
Ans: (a) Litmus.
7. What happens to blue litmus paper when it comes into contact with an acid?
(a) It turns red.
(b) It turns green.
(c) It turns yellow.
(d) It remains blue.
Ans: (a) It turns red.
8. Baking soda turns:
(a) Turmeric to red
(b) Purple-cabbage juice to green
(c) Red litmus to blue
(d) All of the above
Ans: (d) All of the above.
9. What do you call substances that show different colours in acidic, basic, and neutral solutions?
(a) Solvents.
(b) Indicators.
(c) Reactants.
(d) Catalysts.
Ans: (b) Indicators.
10. Substances that are produced when acids react with bases are:
(a) salts.
(b) indicators.
(c) litmus.
(d) antacid.
Ans: (a) Salts.
11. What is formed when an acid and a base neutralise each other?
(a) Water.
(b) A gas.
(c) A salt.
(d) A precipitate.
Ans: (c) A salt.
12. Which of the following is not an acid- base indicator?
(a) Litmus.
(b) Methyl orange.
(c) Phenolphthalein.
(d) Sulphur.
Ans: (d) Sulphur.
13. Which substance is used to treat indigestion according to the chapter?
(a) Baking soda.
(b) Lime water.
(c) Milk of magnesia.
(d) Common salt.
Answer: (c) Milk of magnesia.
14. Which of the following is acidic in nature?
(a) lime juice
(b) human blood
(c) lime water
(d) antacid.
Ans: (a) Lime juice.
15. What colour does turmeric turn when it contacts a basic substance?
(a) Red.
(b) Blue.
(c) Yellow.
(d) Green.
Answer: (a) Red.
16. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
(a) Baking powder
(b) Lime
(c) Ammonium hydroxide solution
(d) Hydrochloric acid.
Ans: (d) Hydrochloric acid.
17. What is the chemical nature of substances that taste bitter and feel soapy?
(a) Acidic.
(b) Basic.
(c) Neutral.
(d) Salty.
Answer: (b) Basic.
18. To protect tooth decay, we are advised to brush our teeth regularly. The nature of the tooth paste commonly used is:
(a) Acidic.
(b) Neutral.
(c) Basic.
(d) Corrosive.
Ans: (c) Basic.
19. What is the main component of vinegar?
(a) Citric acid.
(b) Lactic acid.
(c) Acetic acid.
(d) Tartaric acid.
Answer: (c) Acetic acid.
20. Which of the following is not a mineral acid?
(a) Hydrochloric acid.
(b) Citric acid.
(c) Sulphuric acid.
(d) Nitric acid.
Ans: (b) Citric acid.
21. What type of acid is found in the stomach?
(a) Sulfuric acid.
(b) Nitric acid.
(c) Hydrochloric acid.
(d) Acetic acid.
Answer: (c) Hydrochloric acid.
