Solutions JEE Main 2026 (January) Question Bank
Questions with Answer Keys MathonGo
Q1. JEE Main 2026 (21 January Shift 2)
A substance ' X ' (1.5 g) dissolved in 150 g of a solvent ' Y ' (molar mass = 300 g mol ) led to an elevation of the
−1
boiling point by 0.5 K. The relative lowering in the vapour pressure of the solvent ' Y ' is ____ ×10 . (nearest
−2
integer)
[Given : K of the solvent = 5.0 K kg mol
b
−1
]
Assume the solution to be dilute and no association or dissociation of X takes place in solution.
Q2. JEE Main 2026 (21 January Shift 2)
The osmotic pressure of a living cell is 12 atm at 300 K. The strength of sodium chloride solution that is isotonic
with the living cell at this temperature is ____ gL . (Nearest integer)
−1
Given : R = 0.08 L atm K −1 −1
mol
Assume complete dissociation of NaCl
(Given : Molar mass of Na and Cl are 23 and 35.5 g mol −1
respectively.)
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, Solutions JEE Main 2026 (January) Question Bank
Questions with Answer Keys MathonGo
Q3. JEE Main 2026 (23 January Shift 1)
Which one of the following graphs accurately represents the plot of partial pressure of CS vs its mole fraction in a
2
mixture of acetone and CS at constant temperature?
2
(1) (2)
(3) (4)
Q4. JEE Main 2026 (28 January Shift 2)
Consider the following aqueous solutions.
I. 2.2 g Glucose in 125 mL of solution.
II. 1.9 g Calcium chloride in 250 mL of solution.
III. 9.0 g Urea in 500 mL of solution.
IV. 20.5 g Aluminium sulphate in 750 mL of solution.
The correct increasing order of boiling point of these solutions will be :
[Given : Molar mass in gmol −1
: H = 1, C = 12, N = 14, O = 16, Cl = 35.5, Ca = 40, Al = 27 and S = 32]
(1) III < I < II < IV (2) I < II < III < IV
(3) II < III < I < IV (4) II < III < IV < I
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Questions with Answer Keys MathonGo
Q1. JEE Main 2026 (21 January Shift 2)
A substance ' X ' (1.5 g) dissolved in 150 g of a solvent ' Y ' (molar mass = 300 g mol ) led to an elevation of the
−1
boiling point by 0.5 K. The relative lowering in the vapour pressure of the solvent ' Y ' is ____ ×10 . (nearest
−2
integer)
[Given : K of the solvent = 5.0 K kg mol
b
−1
]
Assume the solution to be dilute and no association or dissociation of X takes place in solution.
Q2. JEE Main 2026 (21 January Shift 2)
The osmotic pressure of a living cell is 12 atm at 300 K. The strength of sodium chloride solution that is isotonic
with the living cell at this temperature is ____ gL . (Nearest integer)
−1
Given : R = 0.08 L atm K −1 −1
mol
Assume complete dissociation of NaCl
(Given : Molar mass of Na and Cl are 23 and 35.5 g mol −1
respectively.)
#PaperPhodnaHai
www.mathongo.com
, Solutions JEE Main 2026 (January) Question Bank
Questions with Answer Keys MathonGo
Q3. JEE Main 2026 (23 January Shift 1)
Which one of the following graphs accurately represents the plot of partial pressure of CS vs its mole fraction in a
2
mixture of acetone and CS at constant temperature?
2
(1) (2)
(3) (4)
Q4. JEE Main 2026 (28 January Shift 2)
Consider the following aqueous solutions.
I. 2.2 g Glucose in 125 mL of solution.
II. 1.9 g Calcium chloride in 250 mL of solution.
III. 9.0 g Urea in 500 mL of solution.
IV. 20.5 g Aluminium sulphate in 750 mL of solution.
The correct increasing order of boiling point of these solutions will be :
[Given : Molar mass in gmol −1
: H = 1, C = 12, N = 14, O = 16, Cl = 35.5, Ca = 40, Al = 27 and S = 32]
(1) III < I < II < IV (2) I < II < III < IV
(3) II < III < I < IV (4) II < III < IV < I
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