1.

Assertion :Molecular mass of benzoic acid when determine by colligative properties is found high. Reason: Dimerisationof benzoic acid.

Answer»

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

Solution :Coligative properties are the properties of solutions containing nonvolatile solute.It is correct that MOLECULAR mass of benzoic acid when determine by colligative properties is found abnormally HIGH.This is because dimerisation of benzoic takes place in solution resulting high molecular mass. Therefore ,assertion and reason are true and reason is explanation.


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