1

JEE Main 2018 (Offline)

MCQ (Single Correct Answer)

+4

-1

For 1 molal aqueous solution of the following compounds, which one will show the highest freezing
point?

2

JEE Main 2018 (Online) 15th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

Two 5 molal solutions are prepared by dissolving a non-electrolyte non-volatile solute separately in the solvents X and Y. The molecular weights of the solvents are M

_{x}and M_{y}, respectively where M_{x}= $${3 \over 4}$$ My. The relative lowering of vapor pressure of the solution in X is ''m'' times that of the solution in Y. Given that the number of moles of solute is very small in comparison to that of the solvent, the value of ''m'' is :3

JEE Main 2017 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

A solution is prepared by mixing 8.5 g of CH

_{2}Cl_{2}and 11.95 g of CHCl_{3}. If vapour pressure of CH_{2}Cl_{2}and CHCl_{3}at 298 K are 415 and 200 mmHg respectively, the mole fraction of CHCl_{3}in vapour form is : (Molar mass of Cl = 35.5 g mol^{−1})4

JEE Main 2017 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

5 g of Na

(K

(molar mass of S = 32 g mol

_{2}SO_{4}was dissolved in x g of H_{2}O. The change in freezing point was found to be 3.82^{o}C. If Na_{2}SO_{4}is 81.5% ionised, the value of x(K

_{f}for water=1.86^{o}C kg mol^{−1}) is approximately :(molar mass of S = 32 g mol

^{−1}and that of Na = 23 g mol^{−1})Questions Asked from Solutions (MCQ (Single Correct Answer))

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