1.

(A) Thermal stability of 16 ^(th) group hydrides decreases from H _(2) O to H_(2) PO (R ) From H _(2)O to H_(2)PObond dissociation energy increases.

Answer»

Both (A) and (R ) are TRUE and (R ) is the CORRECT explanation of (A)
Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
(A) is true but (R ) is FALSE
Both (A) and (R )are false

Answer :C


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