MHT-CET

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Q1.

What is the molal elevation constant of solvent ?

(A)

ratio of boiling point elevation to molarity of solution.

(B)

ratio of boiling point elevation to mole fraction of solution.

(C)

ratio of boiling point elevation to molarity of solute.

(D)

ratio of boiling point elevation to molality of solution.

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Q2.

Find the freezing point of a solution containing $27\ \text{g}$ urea in $1\ \text{dm}^3$ of the aqueous solution. [$K_f = 1.8\ \text{K kg mol}^{-1}$ and molar mass of urea $= 60\ \text{g mol}^{-1}$]

(A)

$-0.81\ ^\circ\text{C}$

(B)

$-0.78\ ^\circ\text{C}$

(C)

$-0.84\ ^\circ\text{C}$

(D)

$-0.87\ ^\circ\text{C}$

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