Assertion (A) : Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid.
Reason (R): Carbon dioxide is given off in the reaction.
Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A). (c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.
Answer
Sodium carbonate reacts with excess hydrochloric acid to form sodium chloride, water and carbon dioxide.
The reaction is given below:
In this reaction, bubbles of carbon dioxide are observed.
Thus,
- Assertion is true
- Reasoning is true
- And Reasoning is the correct explanation of Assertion
So, the correct answer is (a)