Assertion .`N_(3)^(-)` is a weakar base than ` NH_(2)^(-)` . ltbr. Reason . The lone pair of electrons on N atom in `N_(3)^(-)` is in the `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.

Assertion .`N_(3)^(-)` is a weakar base than ` NH_(2)^(-)` . ltbr. Rea

1.	Assertion .`N_(3)^(-)` is a weakar base than ` NH_(2)^(-)` . ltbr. Reason . The lone pair of electrons on N atom in `N_(3)^(-)` is in the `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.
Answer» Correct Answer - 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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