Q.

Among the following statement which one is true?

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a

NH3 is less soluble than PH3, in water

b

NH3 is sfronger base and stronger reducing agent thanPH3

c

NH3 , has higher boiling point than PH3 and has lower melting point than PH3

d

PH3 is stronger reducing agent than NH3 and it has lower critical temperature that NH3

answer is D.

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Detailed Solution

NH3 is a weak reducing agent than PH3 because X - H bond strength decreases down the group. Due to absence of H-bond only weak van der Waals force of attraction exists in PH3 Hence it has lower critical temperature than  NH3
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