Considering x - axis as the internuclear axis which out of the following will not form a sigma bond and why? (a) 1s and 1s (b) 1s and 2p_(x) (c ) 2p_(y) and 2p_(y) (d) s and 2s.

Considering x - axis as the internuclear axis which out of the followi

1.	Considering x - axis as the internuclear axis which out of the following will not form a sigma bond and why? (a) 1s and 1s (b) 1s and 2p_(x) (c ) 2p_(y) and 2p_(y) (d) s and 2s.
Answer» Solution :Only (c ) will not form a `sigma` BOND because taking x - axis as the internuclear axis, there will be SIDEWISE OVERLAP between the TWO `2p_(y)` orbitals forming a `pi-` bond . All other will form `sigma-` bond.