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JEE Main Chemistry question

ChemistryEquilibriumJEE Main

A buffer solution can be prepared from a mixture of: (i) sodium acetate and acetic acid in water (ii) sodium acetate and hydrochloric acid in water (iii) ammonia and ammonium chloride in water (iv) ammonia and sodium hydroxide in water

Answer: (A)

Solution

(i) and (iii) are each a classic weak-acid/conjugate-base or weak-base/conjugate-acid buffer pair. (iv) mixes two bases

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Question ID VK-135894