Question

For question numbers 13 and 14 two statements are given - one labelled
as Assertion (A) and the other labelled as Reason (R). Select the correct
answer to these questions from the codes (a), (b), (c) and (d) as given below:
(a) Both (A) and (R) are true and (R) is correct explanation of the
assertion.
(b) Both (A) and (R) are true but (R) is not the correct explanation of the
assertion.
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.
13. Assertion (A): Ethanoic acid is also known as glacial acetic acid.
Reason (R): The melting point of pure ethanoic acid is 290 K and hence
it often freezes during winters in cold climates.
14. Assertion (A) : The metals and alloys are good conductors of electricity.
Reason (R) : Bronze is an alloy of copper and tin and it is not a good
conductor of electricity.
​

Answer 1

In the first case, both assertion and reason are true.

In the second case, The assertion is not true.

Option (a) and (d) are correct.

Explanation:

• In the first case, both assertion and reason are true.
• In the second case, The assertion is not true.
• As metals are good conductors of electricity but alloys are not good conductors of electricity.
• Metals can conduct electricity due to the movement of electrons as they help them in the flow of current.
• But alloys are harder than metals and therefore poor conductors of electricity.