1.

Give reasons for the following: C Cl_4is immiscible in water, whereas SiCl_4 is easily hydrolyzed.

Answer»

SOLUTION :`C Cl_4` is a covalent compound and cannot FORM H-bond with polar `H_2O` and C does not have d-orbital to accommodate the LONE pair of electrons from oxygen ATOM of water molecule.
Other tetrachlorides are easily hydrolyzed by water because the central atom can accommodate the lone pair of electrons from oxygen atom of water molecule in d-orbital. Hydrolysis can be understood by taking the example of `SiCl_4`. It undergoes hydrolysis by initially ACCEPTING lone pair of electrons from water molecule in d orbitals of Si, finally leading to the formation of `Si(OH)_4` as shown :
`SiCl_4 + 4H_2O to underset"Silicic acid"(Si(OH)_4)+ 4HCl`


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