1
JEE Main 2022 (Online) 26th July Evening Shift
Numerical
+4
-1

A $$10 \mathrm{~g}$$ mixture of hydrogen and helium is contained in a vessel of capacity $$0.0125 \mathrm{~m}^{3}$$ at 6 bar and $$27^{\circ} \mathrm{C}$$. The mass of helium in the mixture is ____________ g. (nearest integer)

Given: $$\mathrm{R}=8.3 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}$$

(Atomic masses of $$\mathrm{H}$$ and $$\mathrm{He}$$ are $$1 \mathrm{u}$$ and $$4 \mathrm{u}$$, respectively)

2
JEE Main 2022 (Online) 26th July Morning Shift
Numerical
+4
-1

A mixture of hydrogen and oxygen contains $$40 \%$$ hydrogen by mass when the pressure is $$2.2$$ bar. The partial pressure of hydrogen is bar. (Nearest Integer)

3
JEE Main 2022 (Online) 25th July Evening Shift
Numerical
+4
-1

A sealed flask with a capacity of 2 dm3 contains 11 g of propane gas. The flask is so weak that it will burst if the pressure becomes 2 MPa. The minimum temperature at which the flask will burst is ___________ $$^\circ$$C. [Nearest integer]

(Given : R = 8.3 J K$$-$$1 mol$$-$$1 , Atomic masses of C and H are 12u and 1u, respectively.) (Assume that propane behaves as an ideal gas.)

4
JEE Main 2022 (Online) 25th July Morning Shift
Numerical
+4
-1

The pressure of a moist gas at $$27^{\circ} \mathrm{C}$$ is $$4 \mathrm{~atm}$$. The volume of the container is doubled at the same temperature. The new pressure of the moist gas is ________________ $$\times 10^{-1} \mathrm{~atm}$$. (Nearest integer)

(Given : The vapour pressure of water at $$27^{\circ} \mathrm{C}$$ is $$0.4 \mathrm{~atm} .$$ )

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