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Assertion: N(3)^(-) is a weaker base tha...

Assertion: `N_(3)^(-)` is a weaker base than `NH_(2)^(-)`
Reason: The lone pair of electrons on N atom in `N_(3)^(-)` is in a `sp^(2)`-orbital while in` NH_(2)^(-)` it is in an sp^(3)`-orbital.

A

If both assertion and reason are correct, and reason is the correct explanation of the assertion.

B

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

C

If assertion is correct, but reason is incorrect .

D

If both assertion and reason are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
a
Basic strength depends upon the availability of
lone pairs of electrons and lone pair of electrons is
more easily available in `NH_(2)^(-) ` than in ` N_(3)^(-)` as it is
present in `sp^(3)` in `NH_(2)^(-) and sp^(2) ` in `N_(3)^(-)` . Hence , R is the correct explanation of A.
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