JEE Main 2023 (Online) 1st February Evening Shift

MCQ (More than One Correct Answer)

-1

The effect of addition of helium gas to the following reaction in equilibrium state, is :

$$\mathrm{PCl}_{5}(\mathrm{g}) \rightleftharpoons \mathrm{PCl}_{3}(\mathrm{g})+\mathrm{Cl}_{2}(\mathrm{g})$$

the equilibrium will shift in the forward direction and more of $$\mathrm{Cl}_{2}$$ and $$\mathrm{PCl}_{3}$$ gases will be produced.

addition of helium will not affect the equilibrium.

helium will deactivate $$\mathrm{PCl}_{5}$$ and reaction will stop.

the equilibrium will go backward due to suppression of dissociation of $$\mathrm{PCl}_{5}$$.

JEE Main 2020 (Online) 3rd September Morning Slot

MCQ (More than One Correct Answer)

-1

Henry’s constant (in kbar) for four gases $$\alpha $$, $$\beta $$, $$\gamma $$ and $$\delta $$ in water at 298 K is given below :

	$$\alpha $$	$$\beta $$	$$\gamma $$	$$\delta $$
K_H	50	2	2 $$ \times $$ 10^-5	0.5

(density of water = 10³ kg m^-3 at 298 K)
This table implies that :

solubility of $$\gamma $$ at 308 K is lower than at 298 K

The pressure of a 55.5 molal solution of $$\delta $$ is 250 bar

$$\alpha $$ has the highest solubility in water at a given pressure

The pressure of a 55.5 molal solution of $$\gamma $$ is 1 bar

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