38. Explain followings-
(a)Inert pair effect
(b) Sigma bond with one example (C)Covalency of oxygen is fix 2, while sulphur shows variable covalency 2,4 & 6.
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(a) Inert pair effect:
On moving down the group, the tendency of s electrons to participate in chemical bonding decreases. This effect is called inert pair effect. Due to this, in group 13, the stability of +3 oxidation state decreases and the stability of +1 oxidation state increases.
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