Chemistryhard · Past Paper
In the reaction $PCl_5 \rightleftharpoons PCl_3 + Cl_2$, how will the equilibrium shift if the pressure is increased?
AShift to the right
BShift to the left
CNo shift occurs
DThe reaction stops
✓ Correct Answer: B — Shift to the left
Increasing pressure favors the side with fewer gas molecules. The left side has 1 mole of gas, while the right has 2 moles.
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