JEE Main 2024 · 8 Apr 2024 Shift 2

Given below are two statements : Statement (I) : A Buffer solution is the mixture of a salt and an acid or a base mixed in any particular quantities. Statement (II) : Blood is naturally occurring buffer solution whose pH is maintained by H₂CO₃/HCO₃⁻ concentrations. 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 emf of cell Tl | Tl⁺ (0.001M) || Cu²⁺ (0.01M) | Cu is 0.83 V at 298 K. It could be increased by :

1. Aincreasing concentration of Tl⁺ ions
2. Bincreasing concentration of Cu²⁺ ions
3. Cincreasing concentration of both Tl⁺ and Cu²⁺ ions
4. Ddecreasing concentration of both Tl⁺ and Cu²⁺ ions

The reaction ; ½ H₂(g) + AgCl(s) → H⁺(aq) + Cl⁻(aq) + Ag(s) occurs in which of the following galvanic cell :

1. AAg | AgCl(s) | KCl(soln.) | AgNO₃(aq) | Ag
2. BPt | H₂(g) | KCl(soln.) | AgCl(s) | Ag
3. CPt | H₂(g) | HCl(soln.) | AgCl(s) | Ag
4. DPt | H₂(g) | HCl(soln.) | AgNO₃(aq) | Ag

For a reaction A ⟶ B ⟶ C If the rate of formation of B is set to be zero then the concentration of B is given by :

1. A(K₁ − K₂)[A]
2. BK₁K₂[A]
3. C(K₁ + K₂)[A]
4. D(K₁/K₂)[A]

Identify the correct statements about p-block elements and their compounds.

1. ANon metals have higher electronegativity than metals.
2. BNon metals have lower ionisation enthalpy than metals.
3. CCompounds formed between highly reactive nonmetals and highly reactive metals are generally ionic.
4. DThe non-metal oxides are generally basic in nature.
5. EThe metal oxides are generally acidic or neutral in nature. Choose the correct answer from the options given below :

Identify the incorrect statements about group 15 elements :

1. ADinitrogen is a diatomic gas which acts like an inert gas at room temperature.
2. BThe common oxidation states of these elements are −3, +3 and +5.
3. CNitrogen has unique ability to form pπ−pπ multiple bonds.
4. DThe stability of +5 oxidation states increases down the group.
5. ENitrogen shows a maximum covalency of 6. Choose the correct answer from the options given below :

The equilibrium Cr₂O₇²⁻ ⇌ 2CrO₄²⁻ is shifted to the right in :

1. Aan acidic medium
2. Ba basic medium
3. Ca neutral medium
4. Da weakly acidic medium

Given below are two statements : Statement (I) : Fusion of MnO₂ with KOH and an oxidising agent gives dark green K₂MnO₄. Statement (II) : Manganate ion on electrolytic oxidation in alkaline medium gives permanganate 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