Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

JEE Main 202125 JulyEvening Shift

Exam: JEE Main
Year: 2021
Date: 25 July
Shift: Evening Shift
Subject: Chemistry
Chapter: Solutions

JEE Main 2021 · 25 July · Evening Shift · Chemistry · Solutions

When 3 . 00g of a substance X ' is dissolved in 100g of CCl _ 4 ,...

When

3 . 00g

of a substance

X

' is dissolved in

100g of {CCl}_{4}

, it raises the boiling point by

0 . 60K

. The molar mass of the substance '

{X}^{'}

is ___ g

{mol}^{- 1}

.
(Nearest integer).
[Given

{K}_{b}

for

{CCl}_{4}

is

\left5 . 0Kkg{mol}^{- 1}\right]

Correct answer

0

Step-by-step solution

${\Delta T}_{b} = {K}_{b} \times molality$

$0 . 60 = 5 \times \left(\dfrac{3 / M}{100 / 100}\right)$

$M = Molarmass$

$M = 250$ .

Practice Solutions on Quantrex Academy →

More from Solutions

In a solvent S , a compound B is partially dissociated into C and D as given below: B… JEE Advanced 2026 Passage: Two volatile liquids A and B form an ideal solution. Consider a 5 molal solution… JEE Advanced 2026 Passage: Two volatile liquids A and B form an ideal solution. Consider a 5 molal solution… JEE Advanced 2026 Given below are two statements: Given: Molar mass of C, H, O, Cl are 12, 1, 16 and 35.5 g… JEE Main 2026 Which of the following statements are not correct? A. For water, magnitude of K_b is more… JEE Main 2026 Given below are two statements : Statement I : H _2 O molecules move from the chamber 1… JEE Main 2026 When 0.25 moles of a non-volatile, non-ionizable solute was dissolved in 1 mole of a… JEE Main 2026 20 g hemoglobin in a 1 L aqueous solution (A) at 300 K is separated from pure water by… JEE Main 2026 Full Solutions list All JEE Main PYQs