Assertion (A) : When zinc is added to dilute hydrochloric acid, hydrogen is given off.
Reason (R): Hydrogen chloride molecules contain hydrochloric acid and hydrogen atoms.
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
The metal zinc readily reacts with hydrochloric acid to produce hydrogen ga s (H 2 ) and zinc chloride (ZnCl 2 ).
The reaction is given below:
Zn + 2HCl → ZnCl 2 + H 2
Also,
Hydrochloric acid molecules contain chloride and hydroxide ions .
Thus,
- Assertion is true
- Reasoning is true
-
And Reasoning is
not the correct
explanation of Assertion
So, the correct answer is (b)
