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Hard Determination of molecular mass using colligative properties, abnormal value of molar mass, van't Hoff factor and its significance MCQs for JEE

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Part of Solutions in JEE Main Chemistry.

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Q1ChemistryUnit 5: Solutions

The method preferred for determining the molecular weight of a polymer is

Q2ChemistryUnit 5: Solutions

Assertion:

\bar{M}_{n}

value is always greater than

\bar{M}_{w}

value for synthetic polymers. Reason: The mass average molecular weight of the polymer is equal to

\bar{M}_{w}

Q3ChemistryUnit 5: Solutions

The freezing point of a solution containing 0.2 g of acetic acid in 20.0 g benzene is lowered by

0.45^{\circ} \mathrm{C}

. The degree of association of acetic acid in benzene is: [Assume acetic acid dimerizes in benzene and

K_{f}

for benzene

=\mathbf{5 . 1 2} \mathbf{K}

\left.\mathrm{kg} \mathrm{mol}^{-1}\right]

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