JEE Main 2018ChemistryChemical EquilibriumEasyMCQ

JEE Main 2018 — Chemical Equilibrium Question with Solution

JEE Main 2018 (16 Apr Online)

Question

For standardizing NaOH solution, which of the following is used as a primary standard?

Choose an option

Show full solutionCorrect option: C
Correct answer
COxalic acid

Step-by-step explanation

A primary standard in metrology is a standard that is sufficiently accurate such that it is not calibrated by or subordinate to other standards. Primary standards are defined via other quantities like length, mass and time. Primary standards are used to calibrate other standards referred to as working standards.

Oxalic acid is used as a primary standard for NaOH standardization.

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About this question

This is a previous-year question from JEE Main 2018, covering the Chemical Equilibrium 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.