p-Block Elements-I 2 Question 17

17. Statement I Between $\mathrm{SiCl}{4}$ and $\mathrm{CCl}{4}$, only $\mathrm{SiCl}_{4}$ reacts with water.

Statement II $\mathrm{SiCl}{4}$ is ionic and $\mathrm{CCl}{4}$ is covalent.

$(2001, S, 1 M)$

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Solution:

  1. $\mathrm{SiCl}_{4}$ reacts with water due to vacant $d$-orbitals available with $\mathrm{Si}$ as:

No such vacant $d$-orbitals are available with carbon, hence $\mathrm{CCl}{4}$ does not react wtih water. Otherwise, both $\mathrm{SiCl}{4}$ and $\mathrm{CCl}_{4}$ are covalent.

Statement I is correct but statement II is incorrect.