JEE Main Chemistry question

Chemistry Equilibrium JEE Main

Which solution will have pH closer to 1.0?

(A)100 mL of (M/10) HCl + 100 mL of (M/10) NaOH
(B)55 mL of (M/10) HCl + 45 mL of (M/10) NaOH
(C)10 mL of (M/10) HCl + 90 mL of (M/10) NaOH
(D)75 mL of (M/5) HCl + 25 mL of (M/5) NaOHCorrect

Answer: (D)

Solution

(D): excess acid = 15−5=10 mmol in 100 mL → [H⁺]=0.1 M → pH=1 exactly.

Question ID VK-136307