Which of the following statement `(s)` is (are) true ? .

Options

A. `CaCl_(2)` is more covalent than `NaCl`
B. `HF` is more polar than `HBr`
C. `HF` is less polar than `HBr`
D. Chemical bond formation takes place when are found of attraction overcome the forces of repulsion

Answer

c

Explanation

`HF` is polar than `HBr` as `EN` of `F` is more than that of `Br`.
`CuCl` a more covalent than `NaCl`, as 18-electron shell of `Cu^(+) ([Ar] 3d^(10))` is more EN because inner electron have poor shielding effect on nucleus, thus increasing the polarising power of nucleus.