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Friday, 9 October

JEE Main 2024 · ChemistryMultiple choiceSingle correctEasyData or graph

JEE Main 9 April 2024, Shift 1, Chemistry Q64

Question 64 of 90 in this shift, Chemistry question 4 of 30, Section A.

The molar conductivity for electrolytes A and B are plotted against C1/2C^{1/2} as shown below. Electrolytes A and B respectively are :

The figure, in words

Graph of Λm\Lambda_m (S cm2^2 mol−1^{-1}) vs C1/2C^{1/2} ((mol L−1^{-1})1/2^{1/2}): curve A starts very high (above 400) at near zero and falls steeply, curving down to a low value near 0.4-0.5; line B starts near about 170-180 and decreases gently and almost linearly with C1/2C^{1/2}; the curves cross near C1/2≈0.1C^{1/2}\approx0.1. Axis marks: 0, 0.2, 0.4 on x; 0, 200, 400 on y.
  1. (1)A: weak electrolyte, B: strong electrolyteOfficial answer
  2. (2)A: strong electrolyte, B: weak electrolyte
  3. (3)A: weak electrolyte, B: weak electrolyte
  4. (4)A: strong electrolyte, B: strong electrolyte

Official answer

Option 1

NTA final key.

Chapter
Electrochemistry
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.