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NH3 has a much higher boiling point than PH3 because

(a) NH3 has a larger molecular weight

(b) NH3 undergoes umbrella inversion

(c) NH3 forms hydrogen bond

(d) NH3 contains ionic whereas PH3 contains covalent

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Correct option is (c) NH3 forms hydrogen bond

PH3 does not form H-bonding because of larger size of P-atom and lesser electronegativity.

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