Statement I : Bond angle in NH3> PH3>AsH3> SbH3Statement II : PH3 is thermally more stable than NH3
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a
Statement I and Statement II are true.
b
Statement I is true and statement II is false.
c
Statement I is false and Statement II is true.
d
Statement I and Statement II are false.
answer is B.
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Detailed Solution
Down the group in the hydrides of 15th group as the electronegativity of central atom decreases, bond angle decreases.Down the group affinity of hydrogen with central atom decreases. X-H bond enthalpy decreases,thermal stability decreases.