Exams › JEE Main › Chemistry

Consider the equilibrium CO(g) + 3H2(g) ⇌ CH4(g) + H2O(g) If the pressure applied over the system increases by two fold at constant temperature then (A) Concentration of reactants and products increases. (B) Equilibrium will shift in forward direction. (C) Equilibrium constant increases since concentration of products increases. (D) Equilibrium constant remains unchanged as concentration of reactants and products remain same. Choose the correct answer from the options given below :

1. (A) and (B) only
2. (A), (B) and (D) only
3. (B) and (C) only
4. (A), (B) and (C) only

Correct answer: (A) and (B) only

Solution

Increasing the pressure on a gaseous equilibrium shifts the reaction towards the side with fewer moles of gas, which in this case is the products side (CH4 and H2O), thus favoring the forward reaction. While the concentrations of reactants and products may increase, the equilibrium constant remains unchanged because it is dependent only on temperature.

Related JEE Main Chemistry questions

• The solubility product constants of Ag$_2$CrO$_4$, AgCl, AgBr and AgI are $1.1\times10^{-12}$, $1.8\times10^{-10}$, $5.0\times10^{-13}$ and $8.3\times10^{-17}$, respectively. If AgNO$_3$ solution is added to a mixture containing equal amounts of NaCl, NaBr, NaI and Na$_2$CrO$_4$, which silver salt will begin to precipitate at the highest Ag$^+$ concentration, i.e. the last one to form?
• Two sparingly soluble salts, MY and NY$_3$, each have the same solubility product constant, $K_{sp}=6.2\times10^{-13}$, at room temperature. Which of the following statements is correct for these two salts?
• Given the equilibrium constants for these reactions: $\text{N}_2 + 3\text{H}_2 \rightleftharpoons 2\text{NH}_3$, $K_1$ $\text{N}_2 + \text{O}_2 \rightleftharpoons 2\text{NO}$, $K_2$ $\text{H}_2 + \tfrac12\text{O}_2 \rightleftharpoons \text{H}_2\text{O}$, $K_3$ What is the equilibrium constant $K$ for the reaction $2\text{NH}_3 + \tfrac52\text{O}_2 \rightleftharpoons 2\text{NO} + 3\text{H}_2\text{O}$?
• In a saturated solution of Ag$_2$C$_2$O$_4$, the concentration of Ag$^+$ ions is $2.2\times10^{-4}\ \text{mol L}^{-1}$. The solubility product constant, $K_{sp}$, of Ag$_2$C$_2$O$_4$ is:
• Which species can behave as both a Brønsted acid and a Brønsted base?
• Select the correct statement: Polyphosphates are used as water-softening agents because they

⚔️ Practice JEE Main Chemistry free + battle 1v1 →