(A) : The value of van der Waals constant “a”, is larger for ammonia than for nitrogen.
(R) : Hydrogen bonding is present in ammonia.

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Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is True but (R) is False

Both (A) and (R) are false

answer is A.

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Detailed Solution

If the hydrogen bonding takes place at intervals a molecule itself is named unit hydrogen bonding.
It takes place in compounds containing two teams such that one cluster contains an atom connected to a negative atom and therefore the other cluster contains an extremely electronegative atom connected to a lesser electronegative atom of the opposite group.
We have to remember that the ammonia contains tough intermolecular forces of attraction. Intermolecular hydrogen bonding is absent in nitrogen.
Hence, the value of Van der Waals constant 'a' is bigger for ammonia than for nitrogen.
So, Both (A) and (R) are correct and (R) is the correct explanation of (A).

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