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Equilibrium — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEquilibrium1 Mark
MCQ
$\mathrm{PCl}_3(\mathrm{~g})+\mathrm{Cl}_2(\mathrm{~g}) \rightleftharpoons \mathrm{PCl}_5(\mathrm{~g})+$ energy For the reaction above, what is the effect of increasing the pressure?
  • ✓
    Increased production of products.
  • B
    Wild fluctuations in the amounts of reactants and products.
  • C
    Increased production of reactants.
  • D
    No impact on the equilibrium.
✓

Answer

Correct option: A.
Increased production of products.
$\mathrm{PCl}_3(\mathrm{~g})+\mathrm{Cl}_2(\mathrm{~g}) \rightleftharpoons \mathrm{PCl}_5(\mathrm{~g})+$ energy
In this reaction, the forward reaction is accompanied by a decrease of moles of gaseous species. So, if pressure on the system is increased then, as per Le Chatelier's principle, the equation shifts in direction in which a decrease in total no. of moles takes place i.e. in formation of products in this case.

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