JEE Main 2025 · 4 Apr 2025 Shift 2

Consider the ground state of chromium atom (Z = 24). How many electrons are with Azimuthal quantum number l = 1 and l = 2 respectively ?

1. A12 and 4
2. B12 and 5
3. C16 and 4
4. D16 and 5

Consider the given data :

1. aHCl(g) + 10 H₂O(l) → HCl.10 H₂O ΔH = −69.01 kJ mol⁻¹
2. bHCl(g) + 40 H₂O(l) → HCl.40 H₂O ΔH = −72.79 kJ mol⁻¹ Choose the correct statement :

Given below are two statements : Statement (I) : Molal depression constant K_f is given by M₁RT_f/ΔS_fus, where symbols have their usual meaning. Statement (II) : K_f for benzene is less than the K_f for water. 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

Half life of zero order reaction A → product is 1 hour, when initial concentration of reactant is 2.0 mol L⁻¹. The time required to decrease concentration of A from 0.50 to 0.25 mol L⁻¹ is :

1. A4 hour
2. B0.5 hour
3. C15 min
4. D60 min

The elements of Group 13 with highest and lowest first ionisation enthalpies are respectively :

1. AB & Ga
2. BB & In
3. CTl & B

Given below are two statements : Statement (I) : The first ionisation enthalpy of group 14 elements is higher than the corresponding elements of group 13. Statement (II) : Melting points and boiling points of group 13 elements are in general much higher than those of corresponding elements of group 14. 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

‘X’ is the number of electrons in t₂g orbitals of the most stable complex ion among [Fe(NH₃)₆]³⁺, [FeCl₆]³⁻, [Fe(C₂O₄)₃]³⁻ and [Fe(H₂O)₆]³⁺. The nature of oxide of vanadium of the type V₂Oₓ is:

1. ANeutral
2. BAmphoteric
3. CBasic
4. DAcidic

The correct order of [FeF₆]³⁻, [CoF₆]³⁻, [Ni(CO)₄] and [Ni(CN)₄]²⁻ complex species based on the number of unpaired electrons present is :

1. A[FeF₆]³⁻ > [CoF₆]³⁻ > [Ni(CN)₄]²⁻ > [Ni(CO)₄]
2. B[CoF₆]³⁻ > [FeF₆]³⁻ > [Ni(CO)₄] > [Ni(CN)₄]²⁻
3. C[FeF₆]³⁻ > [CoF₆]³⁻ > [Ni(CN)₄]²⁻ = [Ni(CO)₄]
4. D[Ni(CN)₄]²⁻ > [FeF₆]³⁻ > [CoF₆]³⁻ > [Ni(CO)₄]