Question 1

1. What is the pH range of the human body?

A) 7.0 to 7.8B) 5.5 to 6.5C) 8.0 to 9.0D) 6.0 to 7.0

Answer

✓ Correct Answer: Option A

Question 2

2. Which acid is naturally present in a tomato?

A) Acetic acidB) Citric acidC) Oxalic acidD) Tartaric acid

Answer

✓ Correct Answer: Option C

Question 3

Question 4

4. Which of the following is considered a strong base?

A) Ammonium hydroxideB) Sodium hydroxideC) Calcium hydroxideD) Magnesium hydroxide

Answer

✓ Correct Answer: Option B

Question 5

5. What is the chemical formula of baking soda?

A) $Na_2CO_3$B) $NaHCO_3$C) NaOHD) NaCl

Answer

✓ Correct Answer: Option B

Question 6

6. Tooth decay starts when the pH of the mouth is lower than:

A) 7.0B) 6.5C) 5.5D) 4.5

Answer

✓ Correct Answer: Option C

Question 7

7. Which gas is usually liberated when a dilute acid reacts with an active metal?

A) OxygenB) HydrogenC) Carbon dioxideD) Nitrogen

Answer

✓ Correct Answer: Option B

Question 8

8. What is the common name of the compound $CaOCl_2$?

A) Baking powderB) Washing sodaC) Bleaching powderD) Plaster of Paris

Answer

✓ Correct Answer: Option C

Question 9

9. The color of phenolphthalein indicator in an acidic medium is:

A) PinkB) RedC) ColorlessD) Blue

Answer

✓ Correct Answer: Option C

Question 10

10. Which of the following salts does NOT contain water of crystallization?

A) Blue vitriolB) Washing sodaC) Baking sodaD) Gypsum

Answer

✓ Correct Answer: Option C

Question 11

11. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solutions would reverse the change?

A) Baking powderB) LimeC) Ammonium hydroxide solutionD) Hydrochloric acid

Answer

✓ Correct Answer: Option D

Question 12

12. "Brine" is an aqueous solution of:

A) Sodium carbonateB) Sodium chlorideC) Sodium bicarbonateD) Sodium hydroxide

Answer

✓ Correct Answer: Option B

Question 13

13. A nettle sting is a natural source of which acid?

A) Methanoic acidB) Lactic acidC) Citric acidD) Tartaric acid

Answer

✓ Correct Answer: Option A

Question 14

14. What is the general nature of non-metallic oxides?

A) AcidicB) BasicC) NeutralD) Amphoteric

Answer

✓ Correct Answer: Option A

Question 15

15. During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through a guard tube containing calcium chloride. The role of calcium chloride is to:

A) Absorb the evolved gasB) Moisten the gasC) Absorb moisture from the gasD) Absorb chloride ions

Answer

✓ Correct Answer: Option C

Question 16

16. Which of the following is an olfactory indicator?

A) LitmusB) Vanilla extractC) TurmericD) Methyl orange

Answer

✓ Correct Answer: Option B

Question 17

17. The reaction between an acid and a base to give a salt and water is known as a:

A) Oxidation reactionB) Reduction reactionC) Neutralization reactionD) Decomposition reaction

Answer

✓ Correct Answer: Option C

Question 18

18. What is the number of water molecules present in one formula unit of gypsum?

A) $\frac{1}{2}$B) 1C) 2D) 10

Answer

✓ Correct Answer: Option C

Question 19

19. Which acid is present in sour milk (curd)?

A) Lactic acidB) Citric acidC) Acetic acidD) Oxalic acid

Answer

✓ Correct Answer: Option A

Question 20

20. Plaster of Paris is obtained by heating:

A) Gypsum at 373 KB) Gypsum at 273 KC) Limestone at 373 KD) Limestone at 273 K

Answer

✓ Correct Answer: Option A

Accepted Answer

✓ Correct Answer: Option A

Acids, Bases and Salts Quiz | Grade 10 Science Interactive MCQ

1. What is the pH range of the human body?

2. Which acid is naturally present in a tomato?

3. What are the general products when an acid reacts with a metal oxide?

4. Which of the following is considered a strong base?

5. What is the chemical formula of baking soda?

6. Tooth decay starts when the pH of the mouth is lower than:

7. Which gas is usually liberated when a dilute acid reacts with an active metal?

8. What is the common name of the compound $CaOCl_2$?

9. The color of phenolphthalein indicator in an acidic medium is:

10. Which of the following salts does NOT contain water of crystallization?

11. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solutions would reverse the change?

12. "Brine" is an aqueous solution of:

13. A nettle sting is a natural source of which acid?

14. What is the general nature of non-metallic oxides?

15. During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through a guard tube containing calcium chloride. The role of calcium chloride is to:

16. Which of the following is an olfactory indicator?

17. The reaction between an acid and a base to give a salt and water is known as a:

18. What is the number of water molecules present in one formula unit of gypsum?

19. Which acid is present in sour milk (curd)?

20. Plaster of Paris is obtained by heating: