JEE Main 2024ChemistryRedox ReactionsMediumMCQ

JEE Main 2024 — Redox Reactions Question with Solution

JEE Main 2024 (01 Feb Shift 1)

Question

Given below are two statements :
Statement (I) : Potassium hydrogen phthalate is a primary standard for standardisation of sodium hydroxide solution.
Statement (II) : In this titration phenolphthalein can be used as indicator.
In the light of the above statements, choose the most appropriate answer from the options given below:

Choose an option

Show full solutionCorrect option: A
Correct answer
ABoth Statement I and Statement II are correct

Step-by-step explanation

A primary standard solution is a highly purified compound that is used to standardise a solution of known concentration for use in titrations and other analytical chemistry procedures.

Potassium hydrogen phthalate is primary standard for NaOH. Formula for  Potassium hydrogen phthalate is C6H5O4K. It behaves as a monobasic acid.

Phenolphthalein is used as an indicator in this titration.

The reaction is, 

Hence option A is the answer.

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About this question

This is a previous-year question from JEE Main 2024, covering the Redox Reactions chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.