JEE-MAIN SERIES Chemistry
Expressing Concentration Of Solutions
8 previous year questions.
Volume: 8 Ques
Yield: Medium
High-Yield Trend
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2026 1
2023 5
2022 1
2019 Chapter Questions 8 MCQs
01
PYQ 2019
medium
chemistry ID: jee-main
The amount of sugar required to prepare of its aqueous solution is :
1
68.4 g
2
17.1 g
3
34.2g
4
136.8 g
02
PYQ 2022
easy
chemistry ID: jee-main
Chlorophyll extracted from the crushed green leaves was dissolved in water to make 2 L solution of Mg of concentration 48 ppm. The number of atoms of Mg in this solution is atoms. The value of is ________. (Nearest integer)
(Given : Atomic mass of Mg is 24 g molβ1; NA = 6.02 Γ 1023 molβ1)
(Given : Atomic mass of Mg is 24 g molβ1; NA = 6.02 Γ 1023 molβ1)
03
PYQ 2022
hard
chemistry ID: jee-main
A flask is filled with equal moles of A and B. The half lives of A and B are 100 s and 50 s respectively and are independent of the initial concentration. The time required for the concentration of A to be four times that of B is ________s.
(Given : In 2 = 0.693)
(Given : In 2 = 0.693)
04
PYQ 2022
easy
chemistry ID: jee-main
The elevation in boiling point for 1 molal solution of non-volatile solute A is 3 K. The depression in freezing point for 2 molal solution of A in the same solvent is 6 K. The ratio of Kb and Kf i.e., is 1 : X. The value of X is [nearest integer]
05
PYQ 2022
medium
chemistry ID: jee-main
The vapour pressures of two volatile liquids A and B at 25Β°C are 50 Torr and 100 Torr, respectively. If the liquid mixture, contains 0.3 mole fraction of A, then the mole fraction of liquid B in the vapour phase is . The value of x is _____.
06
PYQ 2022
medium
chemistry ID: jee-main
The conductivity of a solution of complex with formula CoCl3(NH3)4 corresponds to 1 : 1 electrolyte, then the primary valency of central metal ion is ______.
07
PYQ 2023
easy
chemistry ID: jee-main
Which of the following compounds would give the following set of qualitative analysis?
β’ (i) Fehlingβs Test: Positive
β’ (ii) Na fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not
1
2
3
4
08
PYQ 2026
medium
chemistry ID: jee-main
Given below are two statements:
Statement I: Aluminium is more electropositive than thallium as the standard electrode potential value of is negative and is positive.
Statement II: The sum of first three ionization enthalpies of boron is very high when compared to that of aluminium. Due to this reason boron forms covalent compounds only and aluminium forms ion.
In the light of the above statements, choose the correct answer from the options given below
Statement I: Aluminium is more electropositive than thallium as the standard electrode potential value of is negative and is positive.
Statement II: The sum of first three ionization enthalpies of boron is very high when compared to that of aluminium. Due to this reason boron forms covalent compounds only and aluminium forms ion.
In the light of the above statements, choose the correct answer from the options given below
1
Both Statement I and Statement II are true
2
Both Statement I and Statement II are false
3
Statement I is true but Statement II is false
4
Statement I is false but Statement II is true