JEE Main 2026 — Ionic Equilibrium Question with Solution
JEE Main 2026 (06 April Shift 2)
Question
Given is a concentrated solution of a weak electrolyte of concentration 'c' and dissociation constant 'K'. The degree of dissociation is given by :
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
The dissociation reaction of the weak electrolyte is:
Initial concentrations:
Equilibrium concentrations:
The dissociation constant is given by:
For a weak electrolyte, the degree of dissociation is very small, so .
Solving for :
Answer:
Initial concentrations:
Equilibrium concentrations:
The dissociation constant is given by:
For a weak electrolyte, the degree of dissociation is very small, so .
Solving for :
Answer:
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This is a previous-year question from JEE Main 2026, covering the Ionic Equilibrium chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.