InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
In which of the following pairs of molecules/ ions, the central atoms have `sp^2`-hybridization ?A. `NO_2^-` and `NH_3`B. `BF_3` and `NO_2^-`C. `NH_2^-` and `H_2O`D. `BF_3` and `NH_2^-` |
|
Answer» Correct Answer - B Key Idea For `sp^3` hybridisation , there must be `3 sigma` bonds or `2 sigma` bonds along with a lone pair of electrons. `(i)NO_2^(-) rArr 2 sigma + 1 lp =3 i.e. sp^2` hybridisation `(ii)NH_3 rArr 3 sigma + 1 lp =4 i.e. sp^3` hybridisation `(iii)BF_3 rArr 3 sigma + 0 lp =3 i.e. sp^2` hybridisation `(iv)NH_2^(-) rArr 2 sigma + 2 lp =4 i.e. sp^3` hybridisation `(v)H_2O rArr 2 sigma + 2 lp =4 i.e. sp^3` hybridisation Thus , among the given pairs, only `BF_3` and `NO_2^-` have `sp^2` hybridisation. |
|