Question

Statement-1 :The thermal stability of hydrides of carbon family is in order:
`CH_(4)gtSiH_(4)gtGeH_(4)gtSnH_(4)gtPbH_(4)`
Statement-2: `E-H` bond dissociation enthalpies of the hydrides of carbon family decrease down the group with increasing atomic size.
A. Statement-1 is Ture, Statement-2 is True,Statement-2 is a correct explanation for Statement-1.
B. Statement-1 is Ture, Statement-2 is True,Statement-2 is NOT a correct explalanation for Statement-1
C. Statement-1 is Ture, Statement-2 is False
D. Statement-1 is False, Statement-2 is Ture

Answer 1

Correct Answer - A
Both are correct statement and statement-2 is the correct explanation for Statement-1.Down the group the size of atom increases and thus bond length increases.