Q.

Assertion: Interstitial compounds have higher melting point than those of pure metals.

Reason: Interstitial compounds are chemically more reactive than pure metals.

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a

Assertion is true but the Reason is False.

b

Both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.

c

Both Assertion & Reason are True & the Reason is not correct explanation of the Assertion.

d

Both Assertion & Reason are False.

answer is C.

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Detailed Solution

The melting points of these compounds are higher than that of pure metals due to bonding between the metal and the non-metals, which is stronger than metal-metal bonding. Due to this stronger bonding, they require higher temperature for melting and hence have higher melting point.

The interstitial compounds are chemically inert as the impurity ions are present in the interstitial sites.

The chemical reactivity of such compounds is similar to that of the parent compound.

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