Select the correct statement(s)

Options

A. `NF_3` is a weaker base than `NH_3`
B. `NO^(+)` is more stable than `O_2^(+)`
C. `AlCl_3` has a higher melting print than `AlF_3`
D. `SbCl_3` is more covalent than `SbCl_5`

Explanation

A) F - Electron withdraving
in nature and decreases
the electron density on nitrogen
B) `underset("Bond order =3")(NO^(+))gtunderset("Bond order =2.5")(O_2^(+))`
C) Flourides are more ionic and chlorides are covalent so `AlF_3` has high melting point than `Alcl_3`
D) Compound in higher oxidation state i.e. if central atom is in higheroxidation state . higher is the polarising power