For the reaction $$2 \mathrm{~A} \rightleftharpoons \mathrm{B}+\mathrm{C}, \mathrm{K}_{\mathrm{c}}=4 \times 10^{-3}$$ . At a given time, the composition of reaction mixture is : $$[\mathrm{A}]=[\mathrm{B}]=[\mathrm{G}]=2 \times 10^{-3} \mathrm{M} \text {. }$$  Then, which of the following is correct? 1. Reaction has a tendency to go in forward direction. 2. Reaction has a tendency to go in backward direction. 3. Reaction has gone to completion in forward direction. 4. Reaction is at equilibrium.

Subtopic:  Introduction To Equilibrium |
58%
From NCERT
NEET - 2024
Please attempt this question first.
Hints
Please attempt this question first.

In which of the following equilibria, $$\text{K}_\text{p}$$ and $$\text{K}_\text{c}$$ are NOT equal?

1. $$\mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{HI}_{(\mathrm{g})}$$
2. $$\mathrm{CO}_{(\mathrm{g})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \rightleftharpoons \mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_{2(\mathrm{~g})}$$
3. $$2 \mathrm{BrCl}_{(\mathrm{g})} \rightleftharpoons \mathrm{Br}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$$
4. $$\mathrm{PCl}_{5(\mathrm{~g})} \rightleftharpoons \mathrm{PCl}_{3(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$$
Subtopic:  Kp, Kc & Factors Affecting them |
77%
From NCERT
NEET - 2024
Please attempt this question first.
Hints
Please attempt this question first.

Consider the following reaction in a sealed vessel at equilibrium with concentrations of
$$\text{N}_2=3.0 \times 10^{-3} \text{M}, \text{O}_2=4.2 \times 10^{-3} \text{M}$$ and
$$\text{NO}=2.8 \times 10^{-3}$$
$$2 \text{NO}_{(\text{g})} \rightleftharpoons \text{N}_{2(\text{g})} +\text{O}_{2\text{(g)}}$$
If 0.1 mol L-1 of NO(g) is taken in a closed vessel, what will be degree of dissociation ($$\alpha$$) of NO(g) at equilibrium?

1. 0.0889
2. 0.8889
3. 0.717
4. 0.00889
Subtopic:  Ionisation Constant of Acid, Base & Salt |
From NCERT
NEET - 2024
Please attempt this question first.
Hints
Please attempt this question first.

Consider the reaction in equilibrium
$$\mathrm{PCl}_5=\mathrm{PCl}_3+\mathrm{Cl}_2$$
at $$500 \mathrm{~K} .$$ The concentration of $$\mathrm{PCl}_5=1.40~ \mathrm{M} \text {, }$$ concentration of $$\mathrm{Cl}_2=1.60~ \mathrm{M} \text {, }$$ concentration of $$\mathrm{PCl}_3=1.60 \mathrm{M}$$. Calculate $$K_c$$:

1. 2.00
2. 2.6
3. 1.83
4. 3.4
Subtopic:  Kp, Kc & Factors Affecting them |
87%
From NCERT
NEET - 2024
Please attempt this question first.
Hints
Please attempt this question first.

For the equilibrium
$$\mathrm{2NOCl_\text{(g)}\rightleftharpoons2NO_{\text{(g)}}+Cl_{2{\text{(g)}}}}$$
the value of the equilibrium constant is $$3.0\times10^{-6}$$ at $$1000~K.$$ Find $$K_p$$ for the reaction at this temperature (Given $$R:8.314~\text{J K}^{-1}\text{mol}^{-1}$$):

1. $$1.493$$
2. $$2.494\times10^{-2}$$
3. $$3.0\times10^{-6}$$
4. $$2.494\times10^{-4}$$
Subtopic:  Kp, Kc & Factors Affecting them |
74%
From NCERT
NEET - 2024
Please attempt this question first.
Hints
Please attempt this question first.

At a given temperature and pressure, the equilibrium constant value for the equilibria are given below:
$$3A_2+B_2\rightleftharpoons 2A_3B, K_1\\ A_3B \rightleftharpoons \frac 3{2}A_2+\frac 1{2}B_2, K_2$$
The relation between $$K_1$$ and $$K_2$$ is:
1. $$K^2_1=2K_2$$
2. $$K_2= \frac { K_1 }{2}$$
3. $$K_1=\frac 1{\sqrt K_2}$$
4. $$K_2=\frac 1{\sqrt K_1}$$
Subtopic:  Introduction To Equilibrium |
71%
From NCERT
NEET - 2024
Please attempt this question first.
Hints
Please attempt this question first.

For the reaction in equilibrium
$$\mathrm{N_2(g) +3H_2(g) \rightleftharpoons 2NH_3(g), \Delta H=-Q}$$
Reaction is favoured in forward direction by:
 1 Use of catalyst 2 Decreasing concentration of $$\mathrm{N_2}$$ 3 Low pressure, high temperature and high concentration of ammonia 4 High pressure, low temperature and higher concentration of $$\mathrm{H_2}$$
Subtopic:  Le Chatelier's principle |
80%
From NCERT
NEET - 2024
Please attempt this question first.
Hints
Please attempt this question first.

The ratio of solubility of $$\mathrm{AgCl}$$ in $$0.1~ \mathrm{M} ~\mathrm{KCl}$$ solution to the solubility of $$\mathrm{Ag} \mathrm{Cl}$$ in water is:
(Given : Solubility product of $$\mathrm{AgCl}=10^{-10}$$ )
1. $$10^{-4}$$
2. $$10^{-6}$$
3. $$10^{-9}$$
4. $$10^{-5}$$
Subtopic:  Solubility Product |
From NCERT
NEET - 2024
Please attempt this question first.
Hints

For a weak acid HA, the percentage of dissociation is nearly 1% at equilibrium. If the concentration of acid is 0.1 mol L-1, then the correct option for its Ka at the same temperature will be:
 1 $$1 \times 10^{-4}$$ 2 $$1 \times 10^{-6}$$ 3 $$1 \times 10^{-5}$$ 4 $$1 \times 10^{-3}$$
Subtopic:  Ionisation Constant of Acid, Base & Salt |
65%
From NCERT
NEET - 2023
Please attempt this question first.
Hints
Please attempt this question first.

Which combination of the following substances will result in the formation of an acidic buffer when mixed?
 1 Weak acid and it's salt with a strong base. 2 Equal volumes of equimolar solutions of weak acid and weak base. 3 Strong acid and its salt with a strong base. 4 Strong acid and its salt with a weak base. (The pKa of acid = pKb of the base)
Subtopic:  Buffer |
75%
From NCERT
NEET - 2023
Please attempt this question first.
Hints
Please attempt this question first.