If an extra electron is added to the hypothetical molecule `C_2` this extra electron will occupy the molecular orbital:

Options

A. `pi _(2p)^(** )`
B. `pi_(2p)`
C. `sigma_(2p)^(**)`
D. `sigma_(2p)`

Answer

D

Explanation

Configuration of ` C_2 `
` sigma_(1s)^(2) sigma_(1s)^(**2) sigma_(2s)^(**2) pi _( 2px )^(2) = pi_(2py)^(2) sigma_(2pz)`
an extra electron added to the s2p of the above configuration