Acid, Base & Salt

MCQs: 5

Question: 41. Which of the following gas if formed when an acid reacts with metal carbonate?

1. Carbon monoxide
2. Carbonic acid gas
3. Carbon dioxide gas
4. Hydrochloric acid gas

Answer: (c) Carbon dioxide gas

Question: 42. What happens when hydrogen carbonate reacts with an acid?

1. Carbon monoxide
2. Carbonic acid gas
3. Carbon dioxide gas
4. Hydrochloric acid gas

Answer: (c) Carbon dioxide gas

Question: 43. What happens when carbon dioxide gas is passed through lime water?

1. Lime water turns milky
2. Lime water turns colorless
3. Lime water turns bluish
4. Lime water turns black

Answer: (a) Lime water turns milky

Question: 44. What happens when excess of carbon dioxide gas is passed through lime water?

1. Lime water first turns milky and then colorless
2. Lime water turns bluish
3. Lime water turns milky
4. Lime water turns blackish

Answer: (a) Lime water first turns milky and then colorless

Question: 45. Which of the following is taken orally as medicine in the case of hyperacidity to get relief?

1. Sodium hydroxide
2. Calcium hydroxide
3. Milk of sodium
4. Milk of magnesia

Answer: (d) Milk of magnesia

Question: 46. Which of the following acid is also known as vinegar?

1. Dilute hydrochloric acid
2. Dilute sulphuric acid
3. Dilute acetic acid
4. Dilute tartaric acid

Answer: (c) Dilute acetic acid

Question: 47. What happens when metallic oxide reacts with an acid?

1. Salt and water are formed
2. Oxygen and water are formed
3. Carbon dioxide gas and water are formed
4. Hydrogen gas is formed along with water

Answer: (a) Salt and water are formed

Question: 48. What happens when carbon dioxide gas reacts with water?

1. Oxygen gas is formed
2. Carbon monoxide gas is formed
3. Carbonic acid is formed
4. No reaction takes place

Answer: (c) Carbonic acid is formed

Question: 49. What is the nature of metal oxide?

1. Basic
2. Acidic
3. Neutral
4. None of the above

Answer: (a) Basic

Question: 50. What is the nature of non-metallic oxides?

1. Basic
2. Acidic
3. Neutral
4. None of the above

Answer: (b) Acidic