JEE Main 2024 · 30 Jan 2024 Shift 2

If a substance 'A' dissolves in solution of a mixture of 'B' and 'C' with their respective number of moles as nₐ, nᵦ and n꜀. Mole fraction of C in the solution is :

1. Anᵦ/(nₐ + nᵦ)
2. Bn꜀/(nₐ × nᵦ × n꜀)
3. Cn꜀/(nₐ + nᵦ + n꜀)
4. Dn꜀/(nₐ − nᵦ − n꜀)

Given below are two statements: Statement - I: Since Fluorine is more electronegative than nitrogen, the net dipole moment of NF₃ is greater than NH₃. Statement - II: In NH₃, the orbital dipole due to lone pair and the dipole moment of NH bonds are in opposite direction, but in NF₃ the orbital dipole due to lone pair and dipole moments of N-F bonds are in same direction. In the light of the above statements, choose the most appropriate 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 molecule / ion with square pyramidal shape is

1. APF₅
2. BBrF₅
3. CPCl₅
4. D[Ni(CN)₄]²⁻

The solution from the following with highest depression in freezing point/lowest freezing point is

1. A180 g of acetic acid dissolved in water
2. B180 g of glucose dissolved in water
3. C180 g of benzoic acid dissolved in benzene
4. D180 g of acetic acid dissolved in benzene

Given below are two statements: Statement - I: Along the period, the chemical reactivity of the elements gradually increases from group 1 to group 18. Statement - II: The nature of oxides formed by group 1 elements is basic while that of group 17 elements is acidic. In the light of the above statements, choose the most appropriate 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 I is true

Choose the correct statements about the hydrides of group 15 elements.

1. AThe stability of the hydrides decreases in the order NH₃ > PH₃ > AsH₃ > SbH₃ > BiH₃.
2. BThe reducing ability of the hydride increases in the order NH₃ < PH₃ < AsH₃ < SbH₃ < BiH₃.
3. CAmong the hydrides, NH₃ is strong reducing agent while BiH₃ is mild reducing agent.
4. DThe basicity of the hydrides increases in the order NH₃ < PH₃ < AsH₃ < SbH₃ < BiH₃. Choose the most appropriate from the options given below:

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: H₂Te is more acidic than H₂S. Reason R: Bond dissociation enthalpy of H₂Te is lower than H₂S. In the light of the above statements, choose the most appropriate from the options given below:

1. ABoth A and R are true and R is the correct explanation of A.
2. BBoth A and R are true but R is NOT the correct explanation of A.
3. CA is true but R is false.
4. DA is false but R is true.

Alkaline oxidative fusion of MnO₂ gives “A” which on electrolytic oxidation in alkaline solution produces B. A and B respectively are

1. AMn₂O₃ and MnO₄²⁻
2. BMnO₄²⁻ and Mn₂O₇
3. CMnO₄²⁻ and MnO₄⁻
4. DMn₂O₇ and MnO₄⁻