There will be no effect if HI is removed from a reaction vessel containing this reaction at equilibrium. When HI remove, concentration of all three component is change and reach a new equilibrium stage.
H2 + I2 ⇄ 2HI
So, B is correct option.
The stage in reversible reaction at which rate of forward reaction is equal to rate of backward reaction is equal is called an equilibrium.
To learn more about equilibrium here.
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