1

JEE Main 2019 (Online) 11th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

The freezing point of a diluted milk sample is found to be –0.2

^{o}C, while it should have been –0.5^{o}C for pure milk. How much water has been added to pure milk to make the diluted sample?2

JEE Main 2019 (Online) 10th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

Elevation in the boiling point for 1 molar solution of glucose is 2 K. The depression in the freezing point for 2 molal solution of glucose in the same solvent is 2 K. The relation between K

_{b}and K_{f}is3

JEE Main 2019 (Online) 10th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

Liquids A and B form an ideal solution in the entire composition range. At 350 K, the vaapor pressures of pure A and pure B are 7 $$ \times $$ 10

^{3}Pa and 12 $$ \times $$ 10^{3}Pa, respectively . The composition of the vapor in equilibriumwith a solution containing 40 mole percent of A at this temperature is :4

JEE Main 2019 (Online) 9th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

A solution containing 62 g ethylene glycol in 250 g water is cooled to $$-$$ 10

^{o}C. If K_{f}for water is 1.86 K kg mol^{$$-$$1}, the amount of water (in g) separated as ice is :Questions Asked from Solutions (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions

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