Question

Assertion: Zone refining method is very useful for producing semiconductors.

Reason: Semiconductors are of high purity.

• A. Both assertion and reason are true and reason is the correct explanation of assertion.
• B. Assertion is true but reason is false.
• C. Both assertion and reason are true but reason is not the correct explanation of assertion.
• D. Assertion is false but reason is true.
• E. Assertion and reason both are wrong.

Answer 1

The correct option is C Both assertion and reason are true but reason is not the correct explanation of assertion.

$\text{Analysing assertion}$

Zone refining method is very useful for producing semiconductors because the impurities present in semiconductors are more soluble in the melt than in solid state of the metal.

So, the assertion is correct.

$\text{Analysing reason}$

This method is useful for producing semiconductors of very high purity.

So, reason is also correct but it does not explain the assertion.

Hence, both assertion and reason are true but reason is not the correct explanation of assertion.