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On descending group 14,...

On descending group `14`,

A

the stability of the `+4` oxidation state decreases

B

the stability of the `+2` oxidation state increases

C

the tendency of the inert pair effect decreases

D

both `(1)` and `(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
Inert pair effect arises in the heavier elements of group `14` due to ineffective shielding of the `ns^(2)` electrons by the inner `d`- and `f`-electrons. It becomes more and more prominent on moving down the group due to increase in the number of poor shielding `d`- and `f`-electrons. As a result, the stability of the `+4` oxidation state decreases while that of the `+2` oxidation state increases from `Ge` to `Pb`.
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