Which one of the following statements is not correct?

Options

A. In CO molecule, there are one 'sigma (sigma) and "two Pi'' (pi)` bonds.
B. Both `[SiF_6]^2- and [SiCl_6]^2-` ions are known
C. In `Co_2` molecule, carbon hybridisatiion is sp
D. Fullerences are made by heating graphite in an electric are in the presence of argon gas.

Answer

B

Explanation

Answer(2) Fluorine is a powerful ligand in comparision to chlorine. So, it forms coordiantion with `SiF_4` to form `[SiF_6]^2-` But, chlorine does not form, Hence `[SiCl_6]^2-` is unknown.