Per NCERT §6.11.2, the pH of a solution is defined as which expression?
A−ln[H⁺]
B−log[H⁺]
Clog[H⁺]
D[H⁺]
Answer & Solution
Correct answer: B. −log[H⁺]
NCERT §6.11.2: pH = −log₁₀ a(H⁺); in dilute solution a(H⁺) ≈ [H⁺]/mol L⁻¹.
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