BPSC – Combined Competitive Examination · Question 131
The pH value of a 0.1 N HCl solution is approximately:
Show answer & explanation
Answer: (A) 1.0
Explanation
HCl fully ionises, so [H⁺] = 0.1 mol/L and pH = 1.
- (A) Correct
Correct: [H⁺] = 0.1 M, so pH = −log(0.1) = 1.
- (B) Incorrect
Wrong: pH 11 is basic; HCl is a strong acid.
- (C) Incorrect
Wrong: pH 10 is basic.
- (D) Incorrect
Wrong: pH 2 would be 0.01 M HCl.