JEE Main 2025 · 8 Apr 2025 Shift 2

Correct statements for an element with atomic number 9 are

1. AThere can be 5 electrons for which mₛ = +1/2 and 4 electrons for which mₛ = −1/2
2. BThere is only one electron in pz orbital.
3. CThe last electron goes to orbital with n = 2 and l = 1.
4. DThe sum of angular nodes of all the atomic orbitals is 1. Choose the correct answer from the options given below:

Which of the following binary mixture does not show the behaviour of minimum boiling azeotropes?

1. AH₂O + CH₃COC₂H₅
2. BCS₂ + CH₃COCH₃
3. CCH₃OH + CHCl₃
4. DC₆H₅OH + C₆H₅NH₂

HA (aq) ⇌ H⁺ (aq) + A⁻ (aq) The freezing point depression of a 0.1 m aqueous solution of a monobasic weak acid HA is 0.20 °C. The dissociation constant for the acid is Given : Kf(H₂O) = 1.8 K kg mol⁻¹, molality ≡ molarity

1. A1.1 × 10⁻²
2. B1.38 × 10⁻³
3. C1.89 × 10⁻¹
4. D1.90 × 10⁻³

In a first order decomposition reaction, the time taken for the decomposition of reactant to one fourth and one eighth of its initial concentration are t₁ and t₂ (s), respectively. The ratio t₁/t₂ will be:

1. A4/3
2. B3/2
3. C3/4
4. D2/3

The number of species from the following that are involved in sp³d² hybridization is [Co(NH₃)₆]³⁺, SF₆, [CrF₆]³⁻, [CoF₆]³⁻, [Mn(CN)₆]³⁻ and [MnCl₆]³⁻

1. A4
2. B6
3. C5
4. D3

The atomic number of the element from the following with lowest 1st ionisation enthalpy is :

1. A19
2. B87
3. C35
4. D32

Given below are two statements: Statement I : H₂Se is more acidic than H₂Te Statement II : H₂Se has higher bond enthalpy for dissociation than H₂Te 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

The correct decreasing order of spin only magnetic moment values (BM) of Cu⁺, Cu²⁺, Cr²⁺ and Cr³⁺ ions is :

1. ACr³⁺ > Cr²⁺ > Cu⁺ > Cu²⁺
2. BCu⁺ > Cu²⁺ > Cr³⁺ > Cr²⁺
3. CCr²⁺ > Cr³⁺ > Cu²⁺ > Cu⁺
4. DCu²⁺ > Cu⁺ > Cr²⁺ > Cr³⁺