What is the shape of the $SF_2Cl_2$ molecule?

Amongst $SF_{4}$,$XeF_{4}$,$CF_{4}$ and $H_{2}O$,the number of species with two lone pairs of electrons on the central atom is $.....$ .

Which of the following molecules does not have a lone pair of electrons in the valence shell of the central atom?

In which of the following pairs,the central atoms have the same number of lone pairs of electrons?

Which of the following sets is not correct?

The $H-N-H$ angle in ammonia is $107.6^{\circ}$ while the $H-P-H$ angle in phosphine is $93.5^{\circ}.$ Relative to phosphine, the $p$-character of the lone-pair on ammonia is expected to be