JEE Main 2025 · 2 Apr 2025 Shift 1

CaCO₃(s) + 2HCl(aq) → CaCl₂(aq) + CO₂(g) + H₂O(l) Consider the above reaction, what mass of CaCl₂ will be formed if 250 mL of 0.76 M HCl reacts with 1000 g of CaCO₃? (Given : Molar mass of Ca, C, O, H and Cl are 40, 12, 16, 1 and 35.5 g mol⁻¹ respectively)

1. A5.272 g
2. B2.636 g
3. C3.908 g
4. D10.545 g

According to Bohr’s model of hydrogen atom, which of the following statement is incorrect?

1. ARadius of 4ᵗʰ orbit is four times larger than that of 2ⁿᵈ orbit
2. BRadius of 6ᵗʰ orbit is three times larger than that of 4ᵗʰ orbit
3. CRadius of 8ᵗʰ orbit is four times larger than that of 4ᵗʰ orbit
4. DRadius of 3ʳᵈ orbit is nine times larger than that of 1ˢᵗ orbit

A solution is made by mixing one mole of volatile liquid A with 3 moles of volatile liquid B. The vapour pressure of pure A is 200 mm Hg and that of the solution is 500 mm Hg. The vapour pressure of pure B and the least volatile component of the solution, respectively, are :

1. A1400 mm Hg, A
2. B1400 mm Hg, B
3. C600 mm Hg, A
4. D600 mm Hg, B

If equal volumes of AB₂ and XY (both are salts) aqueous solutions are mixed, which of the following combination will give a precipitate of AY₂ at 300 K? (Given Kₛₚ (at 300 K) for AY₂ = 5.2 × 10⁻⁷)

1. A2.0 × 10⁻² M AB₂, 2.0 × 10⁻² M XY
2. B1.5 × 10⁻⁴ M AB₂, 1.5 × 10⁻³ M XY
3. C2.0 × 10⁻⁴ M AB₂, 0.8 × 10⁻³ M XY
4. D3.6 × 10⁻³ M AB₂, 5.0 × 10⁻⁴ M XY

Among SO₂, NF₃, NH₃, XeF₂, ClF₃ and SF₄, the hybridization of the molecule with non-zero dipole moment and highest number of lone-pairs of electrons on the central atom is :

1. Adsp²
2. Bsp³d
3. Csp³d²
4. Dsp³

The property/properties that show irregularity in first four elements of group-17 is/are :

1. ACovalent radius
2. BElectron affinity
3. CIonic radius
4. DFirst ionization energy Choose the correct answer from the options given below :

Given below are two statements : Statement (I) : The metallic radius of Al is less than that of Ga. Statement (II) : The ionic radius of Al³⁺ is less than that of Ga³⁺. In the light of the above statements, choose the most appropriate answer from the options given below :

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

Given below are two statements : Statement (I) : In octahedral complexes, when Δₒ < P high spin complexes are formed. When Δₒ > P low spin complexes are formed. Statement (II) : In tetrahedral complexes because of Δₜ < P, low spin complexes are rarely formed. In the light of the above statements, choose the most appropriate answer from the options given below :

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