When sodium hydrogen carbonate is added to ethanoic acid a gas evolves. Consider the following statements about the gas evolved.
(a) It turns lime water milky.
(b) It is evolved with a brisk effervescence.
(c) It has a smell of burning Sulphur.
(d) It is also a by-product of respiration.
The correct statements are:
(a) (A) and (B) only
(b) (B) and (D) only
(c) (A), (C) and (D)
(d) (A), (B) and (D)
Answer
When sodium hydrogen carbonate (NaHCO 3 ) reacts with ethanoic acid, the following reaction takes place and CO 2 gas is evolved:
Now,
- CO 2 turns lime water milky
- It is evolved with brisk effervescence
- And it is also a by-product of respiration.
Checking the options:
- (A) It turns lime water milky - This is correct.
- (B) It is evolved with a brisk effervescence - This is correct.
- (C) It has a smell of burning Sulphur - This is not correct.
- (D) It is also a by-product of respiration - This is correct.
Therefore, the correct answer is (d) - (A), (B) and (D)