JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 17 March 2021, Shift 1, Chemistry Q36

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

The correct order of conductivity of ions in water is :

(1) $\mathrm{Cs^+ > Rb^+ > K^+ > Na^+}$ Official answer
(2) $\mathrm{Na^+ > K^+ > Rb^+ > Cs^+}$
(3) $\mathrm{K^+ > Na^+ > Cs^+ > Rb^+}$
(4) $\mathrm{Rb^+ > Na^+ > K^+ > Li^+}$

Official answer

Option 1

NTA final key.

Chapter: Electrochemistry
Topic: Periodic Trends
Idea tested: Hydration Enthalpy and Ionic Mobility

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