JEE Main 2026 · 5 Apr 2026 Shift 2

What volume of hydrogen gas at STP would be liberated by action of 50 mL of H₂SO₄ of 50% purity (density = 1.3 g mL⁻¹) on 20 g of zinc? Given : Molar mass of H, O, S, Zn are 1, 16, 32, 65 g mol⁻¹ respectively.

1. A5.824 L
2. B7.428 L
3. C6.892 L
4. D8.375 L

Which of the following statement(s) is/are true ?

1. AIf two orbitals have the same value of (n + l), the orbital with lower value of n will have lower energy.
2. BEnergies of the orbitals in the same subshell increase with increase in atomic number.
3. CThe size of 2pₓ orbital is less than the size of 3pₓ orbital.
4. DAmong 5f, 6s, 4d, 5p and 5d orbitals, none of the orbitals have 2 radial nodes. Choose the correct answer from the options given below :

The covalent radii of atoms A and B are r_A and r_B, respectively. The covalent bond length and total length of AB molecule are respectively

1. A(r_A + r_B), 2(r_A + r_B)
2. B1/2(r_A + r_B), (r_A + r_B)
3. C(r_A + r_B), (r_A + r_B)
4. D2(r_A + r_B), 1/2(r_A + r_B)

The correct order of molar heat capacities measured at 298 K and 1 bar is :

1. ACopper(s) > Bromine(l) > Helium(g)
2. BBromine(l) > Copper(s) > Helium(g)
3. CHelium(g) > Bromine(l) > Copper(s)
4. DHelium(g) > Bromine(l) = Copper(s)

The reaction A(g) ⇌ B(g) + C(g) was initiated with the amount ‘a’ of A(g). At equilibrium it is found that the amount of A(g) remaining is (a − x) at a total pressure of p. The equilibrium constant Kp of the reaction can be calculated from the expression :

1. Ax²/(a² + x²) × p
2. Bx²/(a² − x²) × p
3. C(a + x²)/x² × p
4. D(a² − x²)/x² × p

One half cell in a voltaic cell is constructed by dipping silver rod in AgNO₃ solution of unknown concentration, other half cell is Zn rod dipped in 1 molar solution of ZnSO₄. A voltage of 1.60 V is measured at 298 K for this cell. What is the concentration of Ag⁺ ions used in terms of log x (x = [Ag⁺])? E°Zn²⁺/Zn = −0.76V, E°Ag⁺/Ag = +0.80V, 2.303RT/F = 0.059V

1. A2/3.9
2. B4/5.9
3. C2.9/2
4. D5.9/4

Given below are two statements : Statement I : The number of pairs among [Al₂O₃, Cr₂O₃], [Cl₂O₇, Mn₂O₇], [Na₂O, V₂O₃] and [CO, N₂O] that contain oxides of same nature (acidic, basic, neutral or amphoteric) is 4. Statement II : Among Na₂O, Al₂O₃, CO and Cl₂O₇, the most basic and acidic oxides are Na₂O and Cl₂O₇, respectively. 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

Given below are two statements : Statement I : Aluminium upon reaction with NaOH forms [Al(OH)₆]³⁻ ion. Statement II : The geometry of ICl₄⁻, ClO₃⁻ and IBr₂⁻ is square planar, pyramidal and linear respectively. 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