Question

Carbon and silicon belong to group IV. The maximum
coordination number of carbon in commonly occurring
compounds is four whereas that of silicon is six. This
is due to -
(A) larger size of silicon
(B) Availability of d-orbitals in silicon
(C) Silicon being vulnerable to attack by nucleophilic
reagents
(D) More electropositive nature of silicon​

Answer 1

Answer:

(a) larger size of silicon

Answer 2

SiCl4 has a larger central atom than CCl4 , which makes more vulnerable to attack in hydrolysis.The differing rates of hydrolysis are attributed to the greater atomic radius of the silicon atom allowing attack at silicon, and to the polar nature of the Si-Cl bonds favoring nucleophilic attack.

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