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JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 17 March 2021, Shift 2, Chemistry Q36

Question 36 of 90 in this shift, Chemistry question 6 of 30, Section A.

The functional groups that are responsible for the ion-exchange property of cation and anion exchange resins, respectively, are :

(1) $-\mathrm{SO_3H}$ and $-\mathrm{NH_2}$ Official answer
(2) $-\mathrm{NH_2}$ and $-\mathrm{COOH}$
(3) $-\mathrm{NH_2}$ and $-\mathrm{SO_3H}$
(4) $-\mathrm{SO_3H}$ and $-\mathrm{COOH}$

Official answer

Option 1

NTA final key.

Chapter: Hydrogen
Topic: Hydrogen and Hydrides
Idea tested: Ion-Exchange Resins for Water Softening

Same idea in other shifts

Asked 3× in all

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 108 of the 174 JEE Main shifts held from 2017 to 2026.