Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Which of the following statements is incorrect?
A
In equilibrium mixture of ice and water kept in perfectly insulated flask, mass of ice and water does not change with time.
B
The intensity of red colour increases when oxalic acid is added to a solution containing iron (III) nitrate and potassium thiocyanate.
C
On addition of catalyst, the equilibrium constant value is not affected.
D
Equilibrium constant for a reaction with negative 
value decreases as the temperature increases.
value decreases as the temperature increases.
Text Solution
Verified by ExpertsThe correct answer is:
B
When oxalic acid is added, it reacts with 
ions to form stable complex ion 
, thus decreasing the conc. of free 
Now, according to Le chatelier’s principle, the reaction will shift in backward direction to increase the conc. of free 
Thus, conc. of 
decreases, so the intensity of red colour decreases.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
In any chemical reaction, equilibrium is supposed to be establish when
Which of the following conditions represents an equilibrium
When rate of forward reaction becomes equal to backward reaction, this state is termed as
In chemical reaction ⇌ , the system will be known in equilibrium when
A chemical reaction is at equilibrium when
In the chemical reaction ⇌ at equilibrium point, state whether