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Which changes shift a given gas equilibrium (Le Chatelier's principle)

This type of question, asked 3 times: 30 Jan 2023, 5 Apr 2024, 29 Jan 2025. All 3 questions below, oldest first.

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  1. Question 1

    30 Jan 2023

    148
    Consider the following equation:
    2SO2(g)+O2(g)⇌2SO3(g),ΔH=−190 kJ2SO_{2}(g) +O_{2}(g) \rightleftharpoons 2SO_{3}(g),\Delta H = - 190\text{ }kJ
    The number of factors which will increase the yield of SO3SO_{3} at equilibrium from the following is A. Increasing temperature B. Increasing pressure C. Adding more SO2SO_{2} D. Adding more O2O_{2} E. Addition of catalyst

  2. Question 2

    5 Apr 2024

    32
    The following reaction occurs in the blast furnace where iron ore is reduced to iron metal
    Fe2O3( s)+3CO(g)⇌2Fe(l)+3CO2( g)Fe_{2}O_{3(\text{ }s)}+ 3CO_{(g)}\rightleftharpoons 2Fe_{(l)}+ 3CO_{2(\text{ }g)}
    Using the Le Chatelier's principle, predict which one of the following will not disturb the equilibrium.

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  3. Question 3

    29 Jan 2025

    106
    Consider the equilibrium
    CO( g)+3H2( g)⇌CH4( g)+H2O( g)CO(\text{ }g) + 3H_{2}(\text{ }g) \rightleftharpoons CH_{4}(\text{ }g) +H_{2}O(\text{ }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 :

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