1
JEE Main 2023 (Online) 1st February Evening Shift
MCQ (More than One Correct Answer)
+4
-1

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

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

A
the equilibrium will shift in the forward direction and more of $$\mathrm{Cl}_{2}$$ and $$\mathrm{PCl}_{3}$$ gases will be produced.
B
addition of helium will not affect the equilibrium.
C
helium will deactivate $$\mathrm{PCl}_{5}$$ and reaction will stop.
D
the equilibrium will go backward due to suppression of dissociation of $$\mathrm{PCl}_{5}$$.
2
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (More than One Correct Answer)
+4
-1
Henry’s constant (in kbar) for four gases $$\alpha$$, $$\beta$$, $$\gamma$$ and $$\delta$$ in water at 298 K is given below :

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

(density of water = 103 kg m-3 at 298 K)
This table implies that :
A
solubility of $$\gamma$$ at 308 K is lower than at 298 K
B
The pressure of a 55.5 molal solution of $$\delta$$ is 250 bar
C
$$\alpha$$ has the highest solubility in water at a given pressure
D
The pressure of a 55.5 molal solution of $$\gamma$$ is 1 bar
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