JEE Main 2024 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 30 January 2024, Shift 2, Chemistry Q83

Question 83 of 90 in this shift, Chemistry question 23 of 30, Section B.

The pH of an aqueous solution containing 1M benzoic acid (

\mathrm{pK_a} = 4.20

) and 1M sodium benzoate is 4.5. The volume of benzoic acid solution in 300 mL of this buffer solution is ________ mL. (given :

\log 2 = 0.3

)

Official answer

100

NTA final key.

Chapter: Equilibrium
Topic: pH and Buffers
Idea tested: Volume Ratios for Buffer Preparation

Same topic in other shifts

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.