Select the correct satements (s) .

Options

A. `NF_(3)` is weaker base than `NH_(3)`
B. `NO^(o+)` is more stable than `O_(2)`
C. `AICI_(3)` has higher melting point than `AIF_(3)`
D. `SbCI_(3)` is more covalent than `SbCI_(5)`

Answer

A, B

Explanation

Correct `EN` of `F gtN` Due to high `EN` of F-atom `N` acquires `+3 delta` charge decreasing ` lp e^(-')s` density hence less basic than `NH_(3)`
(b) Electronic configuration of `NO^(o+)` is
`KK^(**) (sigma 2s)^(2) lt (sigma ^(**)2s)^(2) lt (sigma2pz)^(2) lt( pi 2px)^(2) -= `
`(pi 2p_(y))^(2) lt (pi^(**) 2p_(x))^(1) (pi.^(**)2p_(y))^(1)`
Hence in `No^(o+), e^(-')s` are present in bonding `MO` whereas in `O_(2)` they are present in antibonding `MO` Hence `NO^(o+)` is more stable than `O_(2)`
(c ) Wrong `AICI_(3)` has lower m.pt than `AIF_(3)` According to Fajans rule `AICI_(3)` (larger anion) is more covalent than `AIF_(3)` .
(d) Wrong `SbCI_(5)` (high charge+5) is more covalent than `SbCI_(3)` (lower charge +3)` .