Assertion :The value of van der Waal's constant ' $a$ ' is larger for $N H_{3}$ than for $N_{2}$ . Reason: $N H_{3}$ shows $H$ -bonding.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Due to higher attraction forces in ammonia ( $H$ - bonding), value of van der Waal's constant ' $a$ ' is larger for $N H_{3}$ than for $N_{2}$ .

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Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

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