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Equilibrium Tes...

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  • Question 1
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    What concentration of $$F-CH_2COOH, (K_a = 2.6\times10^{-3})$$ is needed so that $$[H^+] = 2\times10^{-3}$$?

  • Question 2
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    Directions For Questions

    For a reversible reaction at a certain temperature when it is at equilibrium or equilibrium has been attained whether physical or chemical, a change in certain variables might change the state of equilibrium. These variables include pressure, volume, concentration and temperature. Due to these changes, a system under equilibrium changes its state in such a manner, i.e., the equilibrium moves in forward direction or backward direction, so that the effect of change is annuled. For a gaseous phase endothermic decomposition of phosphorus pentachloride, can be made spontaneously by increasing concentration of $$PC{l}_{5}$$, lowering the pressure and increasing temperature of the system.

    ...view full instructions

    The equilibrium, solid $$\rightleftharpoons$$ liquid $$\rightleftharpoons$$ gas, will shift in forward direction when :

  • Question 3
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    Which can act as buffer?

  • Question 4
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    Which of the following reactions proceed in forward direction with an increase in temperature?

  • Question 5
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    Simultaneous solubility of $$AgCNS\ (a)$$ and $$AgBr\ (b)$$ in a solution of water will be

    $${K}_{{sp}_{(AgBr)}}=5\times {10}^{-13}$$ and $${K}_{{sp}_{(AgCNS)}}={10}^{-12}$$ 

  • Question 6
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    For the chemical reaction, $$3X\left(g\right) + Y\left(g\right) \longrightarrow {X}_{3}Y\left(g\right)$$, the amount of $${X}_{3}Y$$ at equilibrium is affected by:

  • Question 7
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    Consider the reversible reaction,

             $$HCN\left(aq\right) \rightleftharpoons {H}^{+}\left(aq\right) + C{N}^{-}\left(aq\right)$$

    At equilibrium, the addition of $$C{N}^{-}\left(aq\right)$$ would :

  • Question 8
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    An aqueous solution of hydrogen sulphide shows the equilibrium,
                 $${H}_{2}S \rightleftharpoons {H}^{+} + H{S}^{-}$$
    If dilute hydrochloric acid is added to an aqueous solution of hydrogen sulphide without any change in temperature, then :

  • Question 9
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    In lime kiln, the reversible reaction,


                  $$CaC{O}_{3}\left(s\right) \rightleftharpoons CaO\left(s\right) + C{O}_{2}\left(g\right)$$

    It proceeds to completion because :

  • Question 10
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    For the reaction,
                 $$PC{l}_{5}\left(g\right) \rightleftharpoons PC{l}_{3}\left(g\right) + C{l}_{2}\left(g\right)$$

    The forward reaction at constant temperature is favoured by :

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