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JEE Main 2025 Apr 2 Shift 2 — Chemistry

25 questions · 25 with the official NTA answer

Q51JEE Main 2025 Apr 2 Shift 2SolutionsMedium

xx g of NaCl is added to water in a beaker with a lid. The temperature of the system is raised from 1°C to 25°C. Which out of the following plots, is best suited for the change in the molarity (M) of the solution with respect to temperature ?

[Consider the solubility of NaCl remains unchanged over the temperature range]

  1. A
    Figure — described from the original paper

    plot of M vs t/°C — M rises steeply to a maximum near 5 °C and then decreases steadily up to 15 °C

  2. B
    Figure — described from the original paper

    plot of M vs t/°C — M decreases linearly with temperature

  3. C
    Figure — described from the original paper

    plot of M vs t/°C — M dips to a shallow minimum near 5 °C and then increases linearly with temperature

  4. D
    Figure — described from the original paper

    plot of M vs t/°C — M increases linearly with temperature

Show answer

Correct option: A

Q52JEE Main 2025 Apr 2 Shift 2Atomic StructureMedium

Which of the following statements are true ?

(A) The subsidiary quantum number ll describes the shape of the orbital occupied by the electron.

(B)

Figure — described from the original paper

two lobes along the x-axis, dumbbell shape

is the boundary surface diagram of the 2px\mathrm{2p}_x orbital.

(C) The ++ and −- signs in the wave function of the 2px\mathrm{2p}_x orbital refer to charge.

(D) The wave function of 2px\mathrm{2p}_x orbital is zero everywhere in the xyxy plane.

Choose the correct answer from the options given below :

  1. A

    (A) and (B) only

  2. B

    (C) and (D) only

  3. C

    (A), (B) and (C) only

  4. D

    (B) and (D) only

Show answer

Correct option: A

Q53JEE Main 2025 Apr 2 Shift 2Chemical ThermodynamicsMedium

Arrange the following in order of magnitude of work done by the system/on the system at constant temperature.

(a) ∣wreversible∣|w_{\text{reversible}}| for expansion in infinite stages.

(b) ∣wirreversible∣|w_{\text{irreversible}}| for expansion in single stage.

(c) ∣wreversible∣|w_{\text{reversible}}| for compression in infinite stages.

(d) ∣wirreversible∣|w_{\text{irreversible}}| for compression in single stage.

Choose the correct answer from the options given below :

  1. A

    d>c=a>bd > c = a > b

  2. B

    a>b>c>da > b > c > d

  3. C

    a>c>b>da > c > b > d

  4. D

    c=a>d>bc = a > d > b

Show answer

Correct option: A

Q54JEE Main 2025 Apr 2 Shift 2Chemical ThermodynamicsHard

Which of the following graphs correctly represents the variation of thermodynamic properties of Haber's process ?

  1. A
    Figure — described from the original paper

    plot vs T/K with curves from top to bottom: −ΔGRθ/T-\Delta G_R^{\theta}/T (around +300 to +200), −ΔHRθ/T-\Delta H_R^{\theta}/T (around +100), ΔHRθ\Delta H_R^{\theta} (just below 0), ΔSRθ\Delta S_R^{\theta} (around −200-200)

  2. B
    Figure — described from the original paper

    plot vs T/K with curves from top to bottom: −ΔHRθ/T-\Delta H_R^{\theta}/T (around +300, decreasing), −ΔGRθ/T-\Delta G_R^{\theta}/T (around +100), ΔHRθ\Delta H_R^{\theta} (just below 0), ΔSRθ\Delta S_R^{\theta} (around −200-200)

  3. C
    Figure — described from the original paper

    plot vs T/K with curves from top to bottom: −ΔHRθ-\Delta H_R^{\theta} (around +200), −ΔGRθ/T-\Delta G_R^{\theta}/T (around +100), ΔHRθ/T\Delta H_R^{\theta}/T (just below 0), ΔSRθ/T\Delta S_R^{\theta}/T (around −200-200)

  4. D
    Figure — described from the original paper

    plot vs T/K with curves from top to bottom: ΔSRθ\Delta S_R^{\theta} (around +200), ΔHRθ\Delta H_R^{\theta} (around +100), −ΔGRθ/T-\Delta G_R^{\theta}/T (near 0, rising), −ΔHRθ/T-\Delta H_R^{\theta}/T (around −200-200 to −300-300, rising)

Show answer

Correct option: B

Q55JEE Main 2025 Apr 2 Shift 2EquilibriumMedium

Consider the following chemical equilibrium of the gas phase reaction at a constant temperature : A(g)⇌B(g)+C(g)\mathrm{A(g) \rightleftharpoons B(g) + C(g)}

If p being the total pressure, Kp\mathrm{K_p} is the pressure equilibrium constant and α\alpha is the degree of dissociation, then which of the following is true at equilibrium ?

  1. A

    When p increases α\alpha decreases

  2. B

    When p increases α\alpha increases

  3. C

    If p value is extremely high compared to Kp\mathrm{K_p}, α≈1\alpha \approx 1

  4. D

    If Kp\mathrm{K_p} value is extremely high compared to p, α\alpha becomes much less than unity

Show answer

Correct option: A

Q56JEE Main 2025 Apr 2 Shift 2Chemical KineticsMedium

Reactant A converts to product D through the given mechanism (with the net evolution of heat) :

A→B\mathrm{A \rightarrow B} \quad slow; \quad ΔH=+ve\Delta H = +\text{ve}

B→C\mathrm{B \rightarrow C} \quad fast; \quad ΔH=−ve\Delta H = -\text{ve}

C→D\mathrm{C \rightarrow D} \quad fast; \quad ΔH=−ve\Delta H = -\text{ve}

Which of the following represents the above reaction mechanism ?

  1. A
    Figure — described from the original paper

    energy vs reaction coordinate — A starts at moderate energy, two humps of similar modest height close together, then curve descends to D well below A

  2. B
    Figure — described from the original paper

    energy vs reaction coordinate — A starts low, three successively higher humps rising like a staircase, then a large drop to D below A

  3. C
    Figure — described from the original paper

    energy vs reaction coordinate — first hump from A is the tallest, followed by two smaller humps of decreasing height, ending at D below A

  4. D
    Figure — described from the original paper

    energy vs reaction coordinate — first hump tall, deep dip, then two more humps with the last one taller again, ending at D below A

Show answer

Correct option: A

Q57JEE Main 2025 Apr 2 Shift 2Chemical Bonding and Molecular StructureMedium

Which among the following molecules is (a) involved in sp3d\mathrm{sp^3d} hybridization, (b) has different bond lengths and (c) has lone pair of electrons on the central atom ?

  1. A

    PF5\mathrm{PF_5}

  2. B

    XeF2\mathrm{XeF_2}

  3. C

    SF4\mathrm{SF_4}

  4. D

    XeF4\mathrm{XeF_4}

Show answer

Correct option: C

Q58JEE Main 2025 Apr 2 Shift 2Classification of Elements and PeriodicityEasy

Electronic configuration of four elements A, B, C and D are given below :

(A) 1s22s22p3\mathrm{1s^2 2s^2 2p^3} \quad (B) 1s22s22p4\mathrm{1s^2 2s^2 2p^4} \quad (C) 1s22s22p5\mathrm{1s^2 2s^2 2p^5} \quad (D) 1s22s22p2\mathrm{1s^2 2s^2 2p^2}

Which of the following is the correct order of increasing electronegativity (Pauling's scale) ?

  1. A

    A<B<C<D\mathrm{A < B < C < D}

  2. B

    A<C<B<D\mathrm{A < C < B < D}

  3. C

    A<D<B<C\mathrm{A < D < B < C}

  4. D

    D<A<B<C\mathrm{D < A < B < C}

Show answer

Correct option: D

Q59JEE Main 2025 Apr 2 Shift 2p-Block ElementsMedium

The nature of oxide (TeO2)\mathrm{(TeO_2)} and hydride (TeH2)\mathrm{(TeH_2)} formed by Te, respectively are :

  1. A

    Oxidising and basic

  2. B

    Oxidising and acidic

  3. C

    Reducing and acidic

  4. D

    Reducing and basic

Show answer

Correct option: B

Q60JEE Main 2025 Apr 2 Shift 2Coordination CompoundsMedium

The d-orbital electronic configuration of the complex among [Co(en)3]3+\mathrm{[Co(en)_3]^{3+}}, [CoF6]3−\mathrm{[CoF_6]^{3-}}, [Mn(H2O)6]2+\mathrm{[Mn(H_2O)_6]^{2+}} and [Zn(H2O)6]2+\mathrm{[Zn(H_2O)_6]^{2+}} that has the highest CFSE is :

  1. A

    t2g6 eg4\mathrm{t_{2g}^{6}\, e_g^{4}}

  2. B

    t2g3 eg2\mathrm{t_{2g}^{3}\, e_g^{2}}

  3. C

    t2g4 eg2\mathrm{t_{2g}^{4}\, e_g^{2}}

  4. D

    t2g6 eg0\mathrm{t_{2g}^{6}\, e_g^{0}}

Show answer

Correct option: D

Q61JEE Main 2025 Apr 2 Shift 2Coordination CompoundsMedium

The type of hybridization and the magnetic property of [MnCl6]3−\mathrm{[MnCl_6]^{3-}} are,

  1. A

    sp3d2\mathrm{sp^3d^2}, paramagnetic with two unpaired electrons.

  2. B

    d2sp3\mathrm{d^2sp^3}, paramagnetic with two unpaired electrons.

  3. C

    sp3d2\mathrm{sp^3d^2}, paramagnetic with four unpaired electrons.

  4. D

    d2sp3\mathrm{d^2sp^3}, paramagnetic with four unpaired electrons.

Show answer

Correct option: C

Q62JEE Main 2025 Apr 2 Shift 2Principles Related to Practical ChemistryEasy

Formation of Na4[Fe(CN)5NOS]\mathrm{Na_4[Fe(CN)_5NOS]}, a purple coloured complex formed by addition of sodium nitroprusside in sodium carbonate extract of salt indicates the presence of :

  1. A

    Sulphate ion

  2. B

    Sodium ion

  3. C

    Sulphide ion

  4. D

    Sulphite ion

Show answer

Correct option: C

Q63JEE Main 2025 Apr 2 Shift 2Purification and Characterisation of Organic CompoundsMedium

Match List - I with List - II.

List - I (Purification technique) List - II (Mixture of organic compounds)
(A) Distillation (simple) (I) Diesel + Petrol
(B) Fractional distillation (II) Aniline + Water
(C) Distillation under reduced pressure (III) Chloroform + Aniline
(D) Steam distillation (IV) Glycerol + Spent-lye

Choose the correct answer from the options given below :

  1. A

    (A)-(II), (B)-(III), (C)-(IV), (D)-(I)

  2. B

    (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

  3. C

    (A)-(III), (B)-(IV), (C)-(II), (D)-(I)

  4. D

    (A)-(II), (B)-(IV), (C)-(I), (D)-(III)

Show answer

Correct option: B

Q64JEE Main 2025 Apr 2 Shift 2Purification and Characterisation of Organic CompoundsMedium

In Dumas' method for estimation of nitrogen, 0.5 gram of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715 mm Hg pressure. The percentage composition of nitrogen in the compound (Aqueous tension at 300 K = 15 mm Hg) is __________%.

  1. A

    18.67

  2. B

    12.57

  3. C

    1.257

  4. D

    20.87

Show answer

Correct option: B

Q65JEE Main 2025 Apr 2 Shift 2Some Basic Principles of Organic ChemistryEasy

In 3,3-dimethylhex-1-en-4-yne, there are _____sp3\mathrm{sp^3}, _____sp2\mathrm{sp^2} and _____sp\mathrm{sp} hybridised carbon atoms respectively.

  1. A

    2, 2, 4

  2. B

    2, 4, 2

  3. C

    4, 2, 2

  4. D

    3, 3, 2

Show answer

Correct option: C

Q66JEE Main 2025 Apr 2 Shift 2HydrocarbonsMedium

Given below are two statements :

Statement (I) : Neopentane forms only one monosubstituted derivative.

Statement (II) : Melting point of neopentane is higher than n-pentane.

In the light of the above statements, choose the most appropriate answer from the options given below :

  1. A

    Both Statement I and Statement II are correct

  2. B

    Both Statement I and Statement II are incorrect

  3. C

    Statement I is correct but Statement II is incorrect

  4. D

    Statement I is incorrect but Statement II is correct

Show answer

Correct option: A

Q67JEE Main 2025 Apr 2 Shift 2Organic Compounds Containing HalogensMedium

Match List - I with List - II.

List - I (Reaction)

(A) 2 C6H5X+2Na→Dry EtherC6H5−C6H5+2NaX\mathrm{2\,C_6H_5X + 2Na \xrightarrow{\text{Dry Ether}} C_6H_5{-}C_6H_5 + 2NaX}

Figure — described from the original paper

two halobenzene molecules coupling to biphenyl

(B) ArN2+X−→HClCuArCl+N2↑+CuX\mathrm{ArN_2^{+}X^{-} \xrightarrow[\text{HCl}]{\text{Cu}} ArCl + N_2\uparrow + CuX}

(C) C2H5Br+NaI→Dry AcetoneC2H5I+NaBr\mathrm{C_2H_5Br + NaI \xrightarrow{\text{Dry Acetone}} C_2H_5I + NaBr}

(D) \mathrm{CH_3C(OH)(CH_3)CH_3 \xrightarrow[\text{ZnCl_2}]{\text{HCl}} CH_3C(Cl)(CH_3)CH_3}

List - II (Name of reaction)

(I) Lucas reaction

(II) Finkelstein reaction

(III) Fittig reaction

(IV) Gatterman reaction

Choose the correct answer from the options given below :

  1. A

    (A)-(IV), (B)-(III), (C)-(I), (D)-(II)

  2. B

    (A)-(III), (B)-(IV), (C)-(II), (D)-(I)

  3. C

    (A)-(III), (B)-(II), (C)-(IV), (D)-(I)

  4. D

    (A)-(IV), (B)-(I), (C)-(II), (D)-(III)

Show answer

Correct option: B

Q68JEE Main 2025 Apr 2 Shift 2Organic Compounds Containing OxygenMedium

Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product ?

(A) R−C≡N→mild condition(i) H+/H2O\mathrm{R{-}C{\equiv}N \xrightarrow[\text{mild condition}]{\text{(i) } H^{+}/H_2O}}

(B) R−MgX→(i) CO2 (ii) H3O+\mathrm{R{-}MgX \xrightarrow{\text{(i) } CO_2 \text{ (ii) } H_3O^{+}}}

(C) R−C≡N→(i) SnCl2/HCl (ii) H3O+\mathrm{R{-}C{\equiv}N \xrightarrow{\text{(i) } SnCl_2/HCl \text{ (ii) } H_3O^{+}}}

(D) R⋅CH2⋅OH→PCC\mathrm{R{\cdot}CH_2{\cdot}OH \xrightarrow{\text{PCC}}}

(E) C6H5−COCl→(i) H2∣Pd-BaSO4 (ii) Br2 water\mathrm{C_6H_5{-}COCl \xrightarrow{\text{(i) } H_2|Pd\text{-}BaSO_4 \text{ (ii) } Br_2 \text{ water}}}

Figure — described from the original paper

benzoyl chloride shown as benzene ring bearing a COCl group

Choose the correct answer from the options given below :

  1. A

    A, B and E only

  2. B

    B, C and E only

  3. C

    B and E only

  4. D

    A and D only

Show answer

Correct option: C

Q69JEE Main 2025 Apr 2 Shift 2Organic Compounds Containing NitrogenHard

When a concentrated solution of sulphanilic acid and 1-naphthylamine is treated with nitrous acid (273 K) and acidified with acetic acid, the mass (g) of 0.1 mole of product formed is :

(Given molar mass in g mol−1\mathrm{g\ mol^{-1}} H : 1, C : 12, N : 14, O : 16, S : 32)

  1. A

    330

  2. B

    33

  3. C

    66

  4. D

    343

Show answer

Correct option: B

Q70JEE Main 2025 Apr 2 Shift 2BiomoleculesEasy

A tetrapeptide, "xx" on complete hydrolysis produced glycine (Gly), alanine (Ala), valine (Val), leucine (Leu) in equimolar proportion each. The number of tetrapeptides (sequences) possible involving each of these amino acids is :

  1. A

    8

  2. B

    16

  3. C

    24

  4. D

    32

Show answer

Correct option: C

Q71JEE Main 2025 Apr 2 Shift 2Chemical KineticsMediumNumerical

For the reaction A→B\mathrm{A \rightarrow B} the following graph was obtained. The time required (in seconds) for the concentration of A to reduce to 2.5 g L−12.5\ \mathrm{g\ L^{-1}} (if the initial concentration of A was 50 g L−150\ \mathrm{g\ L^{-1}}) is __________. (Nearest integer)

Given : log⁡2=0.3010\log 2 = 0.3010

Figure — described from the original paper

concentration of A/(g L−1^{-1}) vs time/s — exponential decay curve starting at 50, passing through about 30 at 5 s, 20 at 10 s, and 10 at about 25 s

Show answer

Answer: 43

Q72JEE Main 2025 Apr 2 Shift 2Redox Reactions and ElectrochemistryMediumNumerical

0.2% (w/v) solution of NaOH is measured to have resistivity 870.0 mΩ m\mathrm{m\Omega\ m}. The molar conductivity of the solution will be __________ ×102 mS dm2 mol−1\times 10^{2}\ \mathrm{mS\ dm^{2}\ mol^{-1}}. (Nearest integer)

Show answer

Answer: 23

Q73JEE Main 2025 Apr 2 Shift 2SolutionsHardNumerical

When 1 g each of compounds AB and AB2\mathrm{AB_2} are dissolved in 15 g of water separately, they increased the boiling point of water by 2.7 K and 1.5 K respectively. The atomic mass of A (in amu) is __________ ×10−1\times 10^{-1} (Nearest integer)

(Given : Molal boiling point elevation constant is 0.5 K kg mol−10.5\ \mathrm{K\ kg\ mol^{-1}})

Show answer

Answer: 25

Q74JEE Main 2025 Apr 2 Shift 2d- and f-Block ElementsHardNumerical

The spin-only magnetic moment value of Mn+\mathrm{M^{n+}} ion formed among Ni, Zn, Mn and Cu that has the least enthalpy of atomisation is __________. (in nearest integer)

Here n is equal to the number of diamagnetic complexes among K2[NiCl4]\mathrm{K_2[NiCl_4]}, [Zn(H2O)6]Cl2\mathrm{[Zn(H_2O)_6]Cl_2}, K3[Mn(CN)6]\mathrm{K_3[Mn(CN)_6]} and [Cu(PPh3)3I]\mathrm{[Cu(PPh_3)_3I]}

Show answer

Answer: 0

Q75JEE Main 2025 Apr 2 Shift 2Organic Compounds Containing HalogensMediumNumerical

2-Bromopentane→alcoholic KOHP (Major Product)→Br2Q\mathrm{2\text{-}Bromopentane \xrightarrow{\text{alcoholic KOH}} P\ (\text{Major Product}) \xrightarrow{Br_2} Q}

Figure — described from the original paper

skeletal structure of 2-bromopentane with Br on carbon 2

Consider the above sequence of reactions. 151 g of 2-bromopentane is made to react. Yield of major product P is 80% whereas Q is 100%.

Mass of product Q obtained is __________ g.

(Given molar mass in g mol−1\mathrm{g\ mol^{-1}} H : 1, C : 12, O : 16, Br : 80)

Show answer

Answer: 184

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