JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 13 April 2023, Shift 2, Chemistry Q84

Question 84 of 90 in this shift, Chemistry question 24 of 30, Section B.

Sea water contains 29.25% NaCl and 19%

\mathrm{MgCl_2}

by weight of solution. The normal boiling point of the sea water is ______

^\circ

C (Nearest integer) Assume 100% ionization for both NaCl and

\mathrm{MgCl_2}

Given :

K_b(\mathrm{H_2O})=0.52\ \mathrm{K\,kg\,mol^{-1}}

Molar mass of NaCl and

\mathrm{MgCl_2}

is 58.5 and 95

\mathrm{g\,mol^{-1}}

respectively.

Official answer

116

NTA final key.

Chapter: Solutions
Topic: Colligative Properties
Idea tested: Boiling Point Elevation

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