JEE Main 2021 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 24 February 2021, Shift 2, Chemistry Q54

Question 54 of 90 in this shift, Chemistry question 24 of 30, Section B.

\mathrm{C_6H_6}

freezes at

5.5^\circ

C. The temperature at which a solution of 10 g of

\mathrm{C_4H_{10}}

in 200 g of

\mathrm{C_6H_6}

freeze is __________

^\circ

C. (The molal freezing point depression constant of

\mathrm{C_6H_6}

5.12^\circ

C/m.)

Official answer

NTA final key.

Chapter: Solutions
Topic: Colligative Properties
Idea tested: Freezing Point Depression

Same idea in other shifts

Asked 16× in all

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28 Jul 2022, Shift 1 · Q84150 g of acetic acid was contaminated with 10.2 g ascorbic acid ( $\mathrm{C_6H_8O_6}$ ) to lower down its freezing point by…EasyNumerical value
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3 Aug 2021, Shift 2 · Q32The lowest freezing point among the following solutions will be observed in [Atomic weight : C = 12, Mg = 24, Na = 23, Cl = 35.5, O = 16,…EasySingle correct

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.