Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Observe the following equilibrium
yellow colourless deep red
Addition of aqueous oxalic acid solution to the above equilibrium
A
Shifts the equilibrium towards the formation of 
B
Deep red color increases
C
Intensity of deep red color decreases
D
No change in equilibrium
Text Solution
Verified by ExpertsThe correct answer is:
C
Addition of oxalic acid 
causes the oxalate ions 
to react with 
ions and form a complex that decreases the concentration of 
ions.
Thus, the equilibrium would shift towards the direction where the concentration of 
ions would increase which is towards left and this decreases the intensity of deep red colour.
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