JEE Main 2024 · 31 Jan 2024 Shift 2

A sample of CaCO₃ and MgCO₃ weighed 2.21 g is ignited to constant weight of 1.152 g. The composition of mixture is : (Given molar mass in g mol⁻¹ CaCO₃ : 100, MgCO₃ : 84)

1. A1.023 g CaCO₃ + 1.187 g MgCO₃
2. B1.187 g CaCO₃ + 1.023 g MgCO₃
3. C1.023 g CaCO₃ + 1.023 g MgCO₃
4. D1.187 g CaCO₃ + 1.187 g MgCO₃

The four quantum numbers for the electron in the outer most orbital of potassium (atomic no. 19) are

1. An = 2, l = 0, m = 0, s = +1/2
2. Bn = 3, l = 0, m = 1, s = +1/2
3. Cn = 4, l = 0, m = 0, s = +1/2
4. Dn = 4, l = 2, m = −1, s = +1/2

Which of the following is least ionic?

1. AKCl
2. BAgCl
3. CBaCl₂
4. DCoCl₂

Given below are two statements : Statement I : S₈ solid undergoes disproportionation reaction under alkaline conditions to form S²⁻ and S₂O₃²⁻. Statement II : ClO₄⁻ can undergo disproportionation reaction under acidic condition. 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 : Group 13 trivalent halides get easily hydrolyzed by water due to their covalent nature. Statement II : AlCl₃ upon hydrolysis in acidified aqueous solution forms octahedral [Al(H₂O)₆]³⁺ ion. 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

Choose the correct statements from the following

1. AAll group 16 elements form oxides of general formula EO₂ and EO₃, where E = S, Se, Te and Po. Both the types of oxides are acidic in nature.
2. BTeO₂ is an oxidising agent while SO₂ is reducing in nature.
3. CThe reducing property decreases from H₂S to H₂Te down the group.
4. DThe ozone molecule contains five lone pairs of electrons. Choose the correct answer from the options given below:

Choose the correct statements from the following

1. AMn₂O₇ is an oil at room temperature
2. BV₂O₄ reacts with acid to give VO₂²⁺
3. CCrO is a basic oxide
4. DV₂O₅ does not react with acid Choose the correct answer from the options given below :

Select the option with correct property -

1. A[NiCl₄]²⁻ Diamagnetic, [Ni(CO)₄] Paramagnetic
2. B[Ni(CO)₄] Diamagnetic, [NiCl₄]²⁻ Paramagnetic
3. C[Ni(CO)₄] and [NiCl₄]²⁻ both Diamagnetic
4. D[Ni(CO)₄] and [NiCl₄]²⁻ both Paramagnetic