Learn

Saturday, 31 October

JEE Main 2021 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 3 August 2021, Shift 1, Chemistry Q54

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

The amount of ethyl alcohol (C2H5OH\mathrm{C_2H_5OH}) that should be added to 1kg of water so that the solution does not freeze at –4ºF (Kf\mathrm{K_f} = 1.86 K kg mol−1\mathrm{mol^{-1}}) in g is ________. (Nearest integer) (Given Atomic mass C=12.0, H=1.0, O=16.0 u)

Official answer

495

NTA final key.

Chapter
Solutions
Topic
Colligative Properties
Idea tested
Antifreeze Mass Calculations

Same idea in other shifts

Asked 2× in all
  1. 1 Feb 2024, Shift 2 · Q83Mass of ethylene glycol (antifreeze) to be added to 18.6 kg of water to protect the freezing point at −24∘C-24^\circ\mathrm{C} is ________ kg…EasyNumerical value

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.