JEE Mains Chemistry Past PapershardMCQ SINGLE

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as ReasonJEE Mains Chemistry Past Papers Chemistry Question

Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : PH3 has lower boiling point than NH3. Reason (R) : In liquid state NH3 molecules are associated through vander waal’s forces, but PH3 molecules are associated through hydrogen bonding. In the light of the above statements, choose the most appropriate answer from the options given below: (A) Both (A) and (R) are correct and (R) is not the correct explanation of (A) (B) (A) is not correct but (R) is correct (C) Both (A) and (R) are correct but (R) is the correct explanation of (A) (D) (A) is correct but (R) is not correct

Answer: D

💡 Solution & Explanation

Unlike NH3, PH3 molecules are not associated through hydrogen bonding in liquid state. That is why the boiling point of PH3 is lower than NH3.

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