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JEE Main Chemistry question

ChemistryEquilibriumJEE Main

Study the following table of buffer solutions (volume in mL of 1 M weak acid, and volume in mL of 0.1 M sodium salt of the weak acid): I: (4.0, 4.0), II: (4.0, 40.0), III: (40.0, 4.0), IV: (0.1, 10.0). Which two of these sets of buffer solutions have the least pH?

Answer: (B)

Solution

Using : I: ; II: ; III: ;

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Question ID VK-135714