General Properties of bases and Uses of bases MCQs || 10th Chemistry Chapter 10

1. What do bases produce when they react with acids?
A) Salt and hydrogen gas
B) Salt and water
C) Water and oxygen
D) Carbon dioxide and water

2. What gas is liberated when alkalis react with ammonium salts?
A) Nitrogen
B) Oxygen
C) Ammonia
D) Hydrogen

3. What happens when alkalis are added to solutions of heavy metal salts?
A) They produce carbon dioxide
B) They precipitate insoluble hydroxides
C) They produce hydrogen gas
D) They evaporate

4. What is a common use of sodium hydroxide?
A) Manufacturing soap
B) Neutralizing acidic soils
C) Treating bee stings
D) Removing grease stains

5. Which alkali is used in alkaline batteries?
A) Sodium hydroxide
B) Calcium hydroxide
C) Potassium hydroxide
D) Magnesium hydroxide

6. What is the use of magnesium hydroxide in the stomach?
A) To produce stomach acid
B) To neutralize acidity
C) To produce ammonia
D) To precipitate hydroxides

7. What is formed when acids react with carbonates?
A) Salt and hydrogen
B) Water and ammonia
C) Salt and carbon dioxide
D) Hydrogen and carbon dioxide

8. What color precipitate is formed when caustic soda reacts with copper salts?
A) White
B) Blue
C) Green
D) Yellow

9. Which of the following is used to remove grease stains from clothes?
A) Sodium hydroxide
B) Ammonium hydroxide
C) Calcium hydroxide
D) Potassium hydroxide

10. What is the primary role of hydrochloric acid in the stomach?
A) To neutralize food
B) To digest food
C) To produce ammonia
D) To protect the stomach lining

11. What is hyperacidity?
A) Low stomach acid production
B) Excess production of stomach acid
C) Neutral stomach acidity
D) Normal stomach acid production

12. What can be a symptom of hyperacidity?
A) Burning sensation in the chest
B) Low energy
C) Excessive sweating
D) Nausea

13. What is a preventive measure for hyperacidity?
A) Eating large meals
B) Lying down after meals
C) Keeping the head elevated while sleeping
D) Eating spicy foods

14. Which acid is used in the etching process on glass?
A) Sulphuric acid
B) Hydrochloric acid
C) Hydrofluoric acid
D) Nitric acid

15. What does the base in the stomach do?
A) Produces more acid
B) Neutralizes stomach acid
C) Stimulates digestion
D) Evaporates food particles

16. What type of reaction occurs between bases and acids?
A) Neutralization
B) Precipitation
C) Oxidation
D) Reduction

17. What is formed when bases react with ammonium salts?
A) Ammonia gas
B) Water
C) Salt
D) Hydrogen gas

18. What effect does hydrochloric acid have on bacteria in food?
A) It promotes bacterial growth
B) It kills harmful bacteria
C) It neutralizes bacteria
D) It has no effect on bacteria

19. Which base is used to soften hard water?
A) Sodium hydroxide
B) Calcium hydroxide
C) Magnesium hydroxide
D) Ammonium hydroxide

20. What color precipitate is formed when caustic soda reacts with zinc salts?
A) White
B) Yellow
C) Brown
D) Green

21. What is an important function of hydrochloric acid in digestion?
A) Producing ammonia
B) Breaking down food molecules
C) Neutralizing acids
D) Creating salts

22. Which of the following bases is used as a foaming agent in fire extinguishers?
A) Magnesium hydroxide
B) Sodium hydroxide
C) Aluminium hydroxide
D) Potassium hydroxide

23. What happens to the skin if it comes in contact with hydrofluoric acid?
A) It is unharmed
B) It can be damaged
C) It heals instantly
D) It becomes stronger

24. Which reaction type involves the formation of water and salt?
A) Neutralization reaction
B) Combustion reaction
C) Decomposition reaction
D) Synthesis reaction

25. Which acid can cause heartburn if produced in excess?
A) Nitric acid
B) Hydrochloric acid
C) Acetic acid
D) Sulphuric acid

26. What do bases form when they react with acids?
A) Salt and carbon dioxide
B) Salt and water
C) Water and ammonia
D) Hydrogen and water

27. Which of the following is a physical property of bases?
A) Taste sour
B) Corrosive to skin
C) Feel slippery
D) Produce hydrogen gas

28. What happens to the pH of a solution when a base is added?
A) It decreases
B) It stays the same
C) It increases
D) It fluctuates

29. What type of gas is ammonia?
A) Acidic gas
B) Neutral gas
C) Basic gas
D) Inert gas

30. Which base is commonly found in antacids?
A) Sodium hydroxide
B) Calcium hydroxide
C) Magnesium hydroxide
D) Potassium hydroxide

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Correct Answers:

1. B
2. C
3. B
4. A
5. C
6. B
7. C
8. B
9. B
10. B
11. B
12. A
13. C
14. C
15. B
16. A
17. A
18. B
19. B
20. A
21. B
22. C
23. B
24. A
25. B
26. B
27. C
28. C
29. C
30. C