Question

Which of the following is true regarding the thermal stability of halides of Carbon family?

(a) CX4 > Si X4 > Ge X4 < Sn X4 > Pb X4

(b) CX4 > Si X4 > Ge X4 > Sn X4 > Pb X4

(c) CX4 > Si X4 > Ge X4 > Sn X4 < Pb X4

(d) CX4 < Si X4 > Ge X4 > Sn X4 > Pb X4

I had been asked this question in unit test.

The doubt is from p-Block Elements in portion p-Block Elements of Chemistry – Class 11

Answer 1

Right choice is (b) CX4 > Si X4 > Ge X4 > Sn X4 > Pb X4

The explanation: All the elements of Carbon family give tetrahedral and covalent halides of the type MX4. The thermal stability follows in the decreasing order of CX4 > Si X4 > Ge X4 > Sn X4 > Pb X4 for the elements of group 14.