Assertion .N_(3)^(-) is a weakar base thanNH_(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 ansp^(3)- orbital.

Assertion .N_(3)^(-) is a weakar base thanNH_(2)^(-) . ltbr. Reason .

1.	Assertion .N_(3)^(-) is a weakar base thanNH_(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 ansp^(3)- orbital.
Answer» If both assertion and reason are correct, and reason is the correct EXPLANATION of the assertion. If both assertion and reason are correct , but reason is not the correct explanation of the assertion. If assertion is correct, but reason is incorrect . If both assertion and reason are incorrect. SOLUTION :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.