1
JEE Main 2020 (Online) 4th September Morning Slot
Numerical
+4
-0
At 300 K, the vapour pressure of a solution
containing 1 mole of n-hexane and 3 moles of
n-heptane is 550 mm of Hg. At the same
temperature, if one more mole of n-heptane is
added to this solution, the vapour pressure of
the solution increases by 10 mm of Hg. What is
the vapour pressure in mm Hg of n-heptane in
its pure state ______?
Your input ____
2
JEE Main 2020 (Online) 3rd September Evening Slot
Numerical
+4
-0
If 250 cm3
of an aqueous solution containing 0.73 g of a protein A is isotonic with one litre of
another aqueous solution containing 1.65 g of a protein B, at 298 K, the ratio of the molecular
masses of A and B is ______ × 10–2 (to the nearest integer).
Your input ____
3
JEE Main 2020 (Online) 9th January Evening Slot
Numerical
+4
-0
A cylinder containing an ideal gas (0.1 mol of
1.0 dm3) is in thermal equilibrium with a large
volume of 0.5 molal aqueous solution of
ethylene glycol at its freezing point. If the
stoppers S1 and S2 (as shown in the figure) are
suddenly withdrawn, the volume of the gas in
litres after equilibrium is achieved will be____.
(Given, Kf (water) = 2.0 K kg mol–1,
R = 0.08 dm3 atm K–1 mol–1)
(Given, Kf (water) = 2.0 K kg mol–1,
R = 0.08 dm3 atm K–1 mol–1)
![JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Solutions Question 94 English](https://imagex.cdn.examgoal.net/7k9k2k5llpx0d/1b199078-ddc6-4e74-8a7f-fb4005c82cbc/4f4a30d0-3b0c-11ea-92dd-4b9c3519996f/file-7k9k2k5llpx0e-393w.jpg)
Your input ____
4
JEE Main 2020 (Online) 9th January Morning Slot
Numerical
+4
-0
How much amount of NaCl should be added
to 600 g of water ($$\rho $$ = 1.00 g/mL) to decrease
the freezing point of water to – 0.2 °C ?
______.
(The freezing point depression constant for water = 2K kg mol–1)
(The freezing point depression constant for water = 2K kg mol–1)
Your input ____
Questions Asked from Solutions (Numerical)
Number in Brackets after Paper Indicates No. of Questions
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