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Chemistry Question on Chemical bonding and molecular structure

Consider the following species 1 . [O2]2−[O_2]^{2-} 2. [CO]+[CO]^+ 3. [O2]+[O_2]^+ Among these sigma bond alone is present in

A

1 alone

B

2 alone

C

3 alone

D

1 and 2

Answer

1 alone

Explanation

Solution

∵\because Among the given species, all are di-atomic species. Only [O2]2−\left[ O _{2}\right]^{2-} contain one σ\sigma bond between two bonded atoms.