NMMS CLASS 7 Acids, Bases and Salts

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NMMS CLASS 7 Acids, Bases and Salts 👇


1. Which acid is present in ant sting?

  • Citric acid
  • Acetic acid
  • Carbonic acid
  • Formic acid

2. Which substance turns blue litmus red?

  • Salt
  • Acid
  • Base
  • Water

3. Which of the following is a natural indicator?

  • Sugar
  • Alcohol
  • Litmus
  • Sand

4. What is the chemical name of baking soda?

  • Calcium carbonate
  • Sodium carbonate
  • Potassium hydroxide
  • Sodium bicarbonate

5. Which gas is released when acid reacts with metal?

  • Hydrogen
  • Oxygen
  • Carbon dioxide
  • Nitrogen

6. Which acid is present in vinegar?

  • Sulphuric acid
  • Formic acid
  • Acetic acid
  • Nitric acid

7. What type of solution turns red litmus blue?

  • Acid
  • Salt
  • Base
  • Neutral solution

8. Which of the following is a strong acid?

  • Hydrochloric acid
  • Acetic acid
  • Carbonic acid
  • Citric acid

9. Which of these is a strong base?

  • Ammonium hydroxide
  • Magnesium hydroxide
  • Calcium hydroxide
  • Sodium hydroxide

10. Which salt is used in making common soap?

  • Sodium sulphate
  • Potassium nitrate
  • Sodium chloride
  • Ammonium chloride

11. The neutralization of acid and base produces —

  • Hydrogen
  • Carbon dioxide
  • Salt and water
  • Oxygen

12. Which of the following is a household base?

  • Vinegar
  • Lemon juice
  • Baking soda
  • Hydrochloric acid

13. Which acid is found in curd?

  • Formic acid
  • Acetic acid
  • Citric acid
  • Lactic acid

14. Which is an example of an alkali?

  • Zinc oxide
  • Potassium hydroxide
  • Copper sulphate
  • Iron oxide

15. Which of the following acids is used in car batteries?

  • Nitric acid
  • Hydrochloric acid
  • Acetic acid
  • Sulphuric acid

16. Which base is used in manufacturing paper?

  • Ammonium hydroxide
  • Calcium hydroxide
  • Sodium hydroxide
  • Magnesium hydroxide

17. Which salt is used for preserving food?

  • Ammonium nitrate
  • Calcium carbonate
  • Sodium chloride
  • Copper sulphate

18. What is the nature of washing soda solution?

  • Acidic
  • Neutral
  • Amphoteric
  • Basic

19. Which acid is present in lemon?

  • Carbonic acid
  • Lactic acid
  • Sulphuric acid
  • Citric acid

20. Which of the following is neutral in nature?

  • Water
  • Baking soda
  • Lime water
  • Soap solution

21. What happens when an acid reacts with a base?

  • Decomposition
  • Combustion
  • Neutralization
  • Displacement

22. Which of the following is not a base?

  • Sodium hydroxide
  • Ammonium chloride
  • Calcium hydroxide
  • Potassium hydroxide

23. The taste of a base is generally —

  • Sour
  • Sweet
  • Bitter
  • Salty

24. Which acid is used in the manufacture of fertilizers?

  • Acetic acid
  • Lactic acid
  • Citric acid
  • Nitric acid

25. Which of the following reacts with acid to form carbon dioxide?

  • Metal oxides
  • Metal chlorides
  • Metal carbonates
  • Metal nitrates

26. Turmeric is a natural indicator. What colour does it show in a base?

  • Yellow
  • Blue
  • Green
  • Red

27. Which gas is produced when acids react with marble chips?

  • Hydrogen
  • Oxygen
  • Carbon dioxide
  • Nitrogen

28. Which substance can be used to neutralize the effect of acid in soil?

  • Slaked lime
  • Ammonium chloride
  • Sodium chloride
  • Acetic acid

29. Which salt is formed when hydrochloric acid reacts with sodium hydroxide?

  • Sodium carbonate
  • Ammonium chloride
  • Sodium chloride
  • Calcium chloride

30. Which acid is present in soda water?

  • Sulphuric acid
  • Nitric acid
  • Acetic acid
  • Carbonic acid
Location: Mogalturu, Andhra Pradesh 534281, India

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