MHT CET 2025 Chemistry question

4 gram of NaOH is added in water to form 500 mL solution at 298 K. What is pH of solution? (Molar mass of NaOH=40 g mol)

Answer: (D)

Solution

Moles of NaOH mol. Volume mL L, so M (NaOH is a strong base, completely ionised). . At 298 K, $pH = 14 - pOH = 14 -

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Question ID VK-101171