Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: The value of van der Waals constant a for ammonia is larger than that of nitrogen gas. Reason: Molecular weight of ammonia is smaller than nitrogen gas.A) If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
B) If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
C) If Assertion: is true but Reason: is false
D) If both Assertion: and Reason: are false
Correct Answer: A
Solution :
Molecular weight of ammonia \[KOH\] Molecular weight of nitrogen gas \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\] Smaller the molecular weight of a gas, higher the value of van der Waals constant a for it. Thus, between \[C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}\] and \[{{N}_{3}}\], the value of van der Waals constant a is higher for \[C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}\].,
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