1.

Assertion:Melting point of n-butane is higher than propane. Reason: it is called oscillation effect

Answer»

If both assertion and reason are true and the reason is the correct explanation of the assertion
If both assertion and reason are true butreason is not the correct explanation of the assertion
if assertion is true but reason is false
If the assertion and reason both are false

Solution :ALKANES with odd carbon atoms have their and carbon atom on the same side of the molecule and in EVEN carbon atom alkane, the end carbon atom on opposite side. Thus alkanes with even carbon atoms are packed closely in crystal lattice to permit GREATER INTERMOLECULAR ATTRACTIONS and hence melting point


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