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JEE Main Chemistry question

ChemistryEquilibriumJEE Main

Which of the following is not a buffer solution? [Indraprastha CET 2009, CG PET 2009]

Answer: (C)

Solution

In (C), moles NaOH (10 mmol) exceed moles acid (5 mmol), so all acid is consumed and excess strong base remains

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Question ID VK-135724