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Chemistry · Ionic Equilibrium

JEE Main 2025 — 7 April, Morning Shift — Question 16

An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water). The pH of HCl solution would (Given log 2=0.302=0.30 )

  1. Option A:

    Increase to 2

  2. Option B:

    Remain same

  3. Option C:

    Reduce to 0.5

  4. Option D:

    Increase to 1.3

    Correct

Answer: D

Step-by-step solution

pH=1⇒H+=10−1M\mathrm{pH}=1 \Rightarrow \mathrm{H}^{+}=10^{-1} \mathrm{M}

Now concentration =0.12=0.05=\frac{0.1}{2}=0.05

pH=−log⁡0.05=1.3\mathrm{pH}=-\log 0.05=1.3

Answer key and solution verified before publishing.

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Exam
JEE Main 2025
Paper
7 April, Morning Shift
Subject
Chemistry
Chapter
Ionic Equilibrium
Topic
Solutions containing one Acid or Base
An aqueous solution of HCl with pH 1.0 is diluted by adding equal… | JEE Main 2025 PYQ with Solution · DhiX AI