1.

Statement-1 :Thethermal 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.

Answer»

STATEMENT-1 is TURE, Statement-2 is TRUE,Statement-2 is a correct explanation for Statement-1.
Statement-1 is Ture, Statement-2 is True,Statement-2 is NOT a correct explalanation for Statement-1
Statement-1 is Ture, Statement-2 is False
Statement-1 is False, Statement-2 is Ture

Solution : 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.


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