A dilute solution contains - x - moles of solute A in 1 kg of solvent with molar elevation constant K b- The solute dimerises in the solution according to the following equation- The degree of association is - -2 A - A 2The molecular mass observed will be-A- Greater than actual molecular massB- Lesser than actual molecular massC- Equal to the actual molecular massD- Cannot be predicted by the data given

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Standard XII

Chemistry

Depression in Freezing Point

A dilute solu...

Question

A dilute solution contains ‘x’ moles of solute A in 1 kg of solvent with molar elevation constant $K_{b}$ . The solute dimerises in the solution according to the following equation. The degree of association is $(α)$ :

$2 A ⇌ A_{2}$

The molecular mass observed will be:

Greater than actual molecular mass

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Lesser than actual molecular mass

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Equal to the actual molecular mass

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Cannot be predicted by the data given

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Solution

The correct option is A Greater than actual molecular mass
$i = \frac{M_{T}}{M_{α}} < 1$

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$2 A ⇌ A_{2}$

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A dilute solution contains ‘x’ moles of solute A in 1 kg of solvent with molar elevation constant Kb. The solute dimerises in the solution according to the following equation. The degree of association is (α): 2A⇌A2 The molecular mass observed will be:

The correct option is A Greater than actual molecular massi=MTMα<1

A dilute solution contains ‘x’ moles of solute A in 1 kg of solvent with molar elevation constant $K_{b}$ . The solute dimerises in the solution according to the following equation. The degree of association is $(α)$ :

$2 A ⇌ A_{2}$

The molecular mass observed will be:

The correct option is A Greater than actual molecular mass
$i = \frac{M_{T}}{M_{α}} < 1$