Both Carbon and Silicon cannot exceed their covalence more than four.

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Solution

Q.
Which of the following statements is incorrect

1 In ${[S i F_{6}]}^{2 -}$ , ${[G e C l_{6}]}^{2 -}$ and ${[S n {(O H)}_{6}]}^{2 -}$ ; the central atoms are in $s p^{3} d^{2}$ hybridized state.

2 Both Carbon and Silicon cannot exceed their covalence more than four.

3 Lead is more stable in +2 oxidation state due to inert pair effect.

4 In group-14 carbon has unique ability of forming $p π - p π$ multiple bonds with itself and also with small sized atom like O, N etc.

Ans.
(2)

C = 4, Si = 6

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Solution

Q. Which of the following statements is incorrect

1 In [SiF6]2-, [GeCl6]2- and [Sn(OH)6]2-; the central atoms are in sp3d2 hybridized state.

2 Both Carbon and Silicon cannot exceed their covalence more than four.

3 Lead is more stable in +2 oxidation state due to inert pair effect.

4 In group-14 carbon has unique ability of forming pπ–pπ multiple bonds with itself and also with small sized atom like O, N etc.

Ans. (2) C = 4, Si = 6

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Q.
Which of the following statements is incorrect

1 In ${[S i F_{6}]}^{2 -}$ , ${[G e C l_{6}]}^{2 -}$ and ${[S n {(O H)}_{6}]}^{2 -}$ ; the central atoms are in $s p^{3} d^{2}$ hybridized state.

4 In group-14 carbon has unique ability of forming $p π - p π$ multiple bonds with itself and also with small sized atom like O, N etc.

Ans.
(2)

C = 4, Si = 6