JEE Main 2026 · 2 Apr 2026 Shift 2

The ratio of mass percentage (w/w) of C : H in a hydrocarbon is 12 : 1. It has two carbon atoms. The weight (in g) of CO₂(g) formed when 3.38 g of this hydrocarbon is completely burnt in oxygen is : (Given : Molar mass in g mol⁻¹ C : 12, H : 1, O : 16)

1. A5.68
2. B11.44
3. C22.74
4. D17.05

The first and second ionization constants of a weak dibasic acid H₂A are 8.1 × 10⁻⁸ and 1.0 × 10⁻¹³ respectively. 0.1 mol of H₂A was dissolved in 1L of 0.1 M HCl solution. The concentration of HA⁻ in the resultant solution is :

1. A0.1 M
2. B9.53 × 10⁻⁶ M
3. C8.1 × 10⁻⁸ M
4. D1.0 × 10⁻¹³ M

SF₄ is isostructural with :

1. ABrF₄⁻
2. BCH₄
3. CIF₄⁺
4. DXeF₄
5. EXeO₂F₂ Choose the correct answer from the options given below :

Gas ‘A’ undergoes change from state ‘X’ to state ‘Y’. In this process, the heat absorbed and work done by the gas is 10 J and 18 J respectively. Now gas is brought back to state ‘X’ by another process during which 6 J of heat is evolved. In the reverse process of ‘Y’ to ‘X’,

1. A18 J of the work is done by the gas ‘A’.
2. B2 J of the work is done by the gas ‘A’.
3. C12 J of the work is done on the gas ‘A’ by the surrounding.
4. D14 J of the work is done on the gas ‘A’ by the surrounding.

Solution A is prepared by dissolving 1 g of a protein (molar mass = 50000 g mol⁻¹) in 0.5 L of water at 300 K. Its osmotic pressure is x bar. Solution B is made by dissolving 2 g of same protein in 1 L of water at 300 K. Osmotic pressure of solution B is y bar. Entire solution of A is mixed with entire solution of B at same temperature. The osmotic pressure of resultant solution is z bar. x, y and z respectively are : (R = 0.083 L bar mol⁻¹ K⁻¹)

1. A9.96 × 10⁻⁴; 9.96 × 10⁻⁴; 9.96 × 10⁻⁴
2. B9.96 × 10⁻⁴; 9.96 × 10⁻⁴; 19.92 × 10⁻⁴
3. C4.98 × 10⁻⁴; 4.98 × 10⁻⁴; 9.96 × 10⁻⁴
4. D4.98 × 10⁻⁴; 4.98 × 10⁻⁴; 4.98 × 10⁻⁴

At 25°C, 20.0 mL of 0.2 M weak monoprotic acid HX is titrated against 0.2 M NaOH. The pH of the solution

1. aat the start of the titration (when NaOH has not been added) and
2. bwhen 10 mL of NaOH is added respectively, are : Given : Kₐ = 5 × 10⁻⁴; pKₐ = 3.3; α << 1

The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides is :

1. ANa₂O, K₂O, Al₂O₃ and As₂O₃
2. BAl₂O₃, As₂O₃, CO and NO
3. CK₂O, Cl₂O₇, As₂O₃ and NO
4. DNa₂O, N₂O, Al₂O₃ and CO

Given below are two statements : Statement I : The second ionization enthalpy of B, Al and Ga is in the order of B > Al > Ga. Statement II : The correct order in terms of first ionization enthalpy is Si < Ge < Pb < Sn. In the light of the above statements, choose the correct answer from the options given below :

1. ABoth Statement I and Statement II are true
2. BBoth Statement I and Statement II are false
3. CStatement I is true but Statement II is false
4. DStatement I is false but Statement II is true