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Solutions — JEE Chemistry MCQs

Master Solutions for JEE Main with free chemistry MCQs. Each question includes a detailed solution and instant feedback — practice at easy, medium, and hard difficulty levels to build exam-ready confidence.

8 practice questions with instant feedback and solutions.

Easy•Solutions
The molarity of a solution containing 44 g of NaOH in 500500 mL solution is (Molar mass of NaOH = 4040 g/mol):
Easy•Solutions
The osmotic pressure of a solution containing 66 g of urea (molar mass = 6060 g/mol) in 500500 mL of solution at 27°27°C is (R = 0.0820.082 L·atm/mol·K):
Easy•Solutions
The boiling point elevation of a solution containing 3 g of urea (molar mass = 60 g/mol) in 100 g of water is: (Kb for water = 0.52 K kg/mol)
Medium•Solutions
The reagent(s) that can selectively precipitate S2−\mathrm{S}^{2-} from a mixture of S2−\mathrm{S}^{2-} and SO42−\mathrm{SO}_{4}^{2-} in aqueous solution is(are)
Medium•Solutions
[JEE Mains 2026] Statement-I: The Henry's law constant (Kₕ) for an ideal dilute solution does not change with varying the concentration of solute at a given temperature. Statement-II: For a solution having the same gas as solute, Kₕ is independent of the nature of the solvent. Which of the following is correct?
Medium•Solutions
[JEE Mains 2026] 100 g of 98% (by weight) H₂SO₄ is mixed with 100 g of 49% (by weight) H₂SO₄. What is the mole fraction of H₂SO₄ in the resulting solution?
Medium•Solutions
For the following cell, Zn(s)∣ZnSO4(aq)∥CuSO4(aq)∣Cu(s) \mathrm{Zn}(s)\left|\mathrm{ZnSO}_{4}(a q) \| \mathrm{CuSO}_{4}(a q)\right| \mathrm{Cu}(s) when the concentration of Zn2+\mathrm{Zn}^{2+} is 10 times the concentration of Cu2+\mathrm{Cu}^{2+}, the expression for ΔG(\Delta G\left(\right. in Jmol−1)\left.\mathrm{J} \mathrm{mol}^{-1}\right) is [ F\mathrm{F} is Faraday constant; R\mathrm{R} is gas constant; T\mathrm{T} is temperature; Eo(E^{o}( cell )=1.1 V)=1.1 \mathrm{~V} ]
Medium•Solutions
Plotting 1/Λm1 / \Lambda_{\mathrm{m}} against cΛm\mathrm{c} \Lambda_{\mathrm{m}} for aqueous solutions of a monobasic weak acid (HX) resulted in a straight line with y-axis intercept of P\mathrm{P} and slope of S\mathrm{S}. The ratio P/S\mathrm{P} / \mathrm{S} is [Λm=\left[\Lambda_{\mathrm{m}}=\right. molar conductivity Λmo=\Lambda_{\mathrm{m}}^{\mathrm{o}}= limiting molar conductivity c=\mathrm{c}= molar concentration Ka=\mathrm{K}_{\mathrm{a}}= dissociation constant of HX\mathrm{HX} ]