HCl is a strong acid, completely dissociates. [H⁺] = 0.001 M = 10⁻³ M. pH = -log[H⁺] = -log(10⁻³) = 3.
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JEE Main 2025 — Chemistry Physical Chemistry
easy
mcq
2025
Official previous-year question
Verified 30 May 2026.
Question
The pH of a 0.001 M HCl solution is:
Options
- A
2
- B
3
- C
4
- D
1
Solution
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