JEE Main 2025 · 2 Apr 2025 Shift 2

Consider the following chemical equilibrium of the gas phase reaction at a constant temperature : A(g) ⇌ B(g) + C(g) If p being the total pressure, Kₚ is the pressure equilibrium constant and α is the degree of dissociation, then which of the following is true at equilibrium ?

1. AWhen p increases α decreases
2. BWhen p increases α increases
3. CIf p value is extremely high compared to Kₚ, α ≈ 1
4. DIf Kₚ value is extremely high compared to p, α becomes much less than unity

Which among the following molecules is

1. ainvolved in sp³d hybridization
2. bhas different bond lengths and
3. chas lone pair of electrons on the central atom?

Electronic configuration of four elements A, B, C and D are given below :

1. A1s²2s²2p³
2. B1s²2s²2p⁴
3. C1s²2s²2p⁵
4. D1s²2s²2p² Which of the following is the correct order of increasing electronegativity (Pauling’s scale) ?

The nature of oxide (TeO₂) and hydride (TeH₂) formed by Te, respectively are :

1. AOxidising and basic
2. BOxidising and acidic
3. CReducing and acidic
4. DReducing and basic

The d-orbital electronic configuration of the complex among [Co(en)₃]³⁺, [CoF₆]³⁻, [Mn(H₂O)₆]²⁺ and [Zn(H₂O)₆]²⁺ that has the highest CFSE is :

1. At₂g⁶ eᵍ⁴
2. Bt₂g³ eᵍ²
3. Ct₂g⁴ eᵍ²
4. Dt₂g⁶ eᵍ⁰

The type of hybridization and the magnetic property of [MnCl₆]³⁻ are,

1. Asp³d², paramagnetic with two unpaired electrons.
2. Bd²sp³, paramagnetic with two unpaired electrons.
3. Csp³d², paramagnetic with four unpaired electrons.
4. Dd²sp³, paramagnetic with four unpaired electrons.

Formation of Na₄[Fe(CN)₅NOS], a purple coloured complex formed by addition of sodium nitroprusside in sodium carbonate extract of salt indicates the presence of :

1. ASulphate ion
2. BSodium ion
3. CSulphide ion
4. DSulphite ion

In Dumas’ method for estimation of nitrogen, 0.5 gram of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715 mm Hg pressure. The percentage composition of nitrogen in the compound (Aqueous tension at 300 K = 15 mm Hg) is ________%.

1. A18.67
2. B12.57
3. C1.257
4. D20.87