JEE Main 2025 April 8 Shift 2 Chemistry Question Paper, Exam Analysis, and Answer Keys (Available)

Given below are two statements:

Statement I: \( H_2Se \) is more acidic than \( H_2Te \)

Statement II: \( H_2Se \) has higher bond enthalpy for dissociation than \( H_2Te \)

In the light of the above statements, choose the correct answer from the options given below.

• (1) Statement I is false but Statement II is true
• (2) Statement I is true but Statement II is false
• (3) Both Statement I and Statement II are false
• (4) Both Statement I and Statement II are true

The correct decreasing order of spin only magnetic moment values (BM) of \( Cu^+ \), \( Cu^{2+} \), \( Cr^{2+} \) and \( Cr^{3+} \) ions is:

• (1) \( Cu^+ > Cu^{2+} > Cr^{3+} > Cr^{2+} \)
• (2) \( Cr^{3+} > Cr^{2+} > Cu^+ > Cu^{2+} \)
• (3) \( Cu^{2+} > Cu^+ > Cr^{2+} > Cr^{3+} \)
• (4) \( Cr^{2+} > Cr^{3+} > Cu^{2+} > Cu^+ \)

Match the LIST-I with LIST-II

LIST-I (Reagent)                               LIST-II (Functional Group detected)

A. Sodium bicarbonate solution   I. double bond/unsaturation

B. Neutral ferric chloride               II. carboxylic acid

C. Ceric ammonium nitrate           III. phenolic -OH

D. Alkaline KMnO\(_4\)                  IV. alcoholic -OH

Choose the correct answer from the options given below:

• (1) A-III, B-III, C-I, D-IV
• (2) A-III, B-II, C-IV, D-I
• (3) A-II, B-III, C-IV, D-I
• (4) A-II, B-IV, C-III, D-I

Given below are two statements:

Statement I: A homoleptic octahedral complex, formed using monodentate ligands, will not show stereoisomerism

Statement II: cis- and trans-platin are heteroleptic complexes of Pd.

In the light of the above statements, choose the correct answer from the options given below

• (1) Both Statement I and Statement II are false
• (2) Statement I is true but Statement II is false
• (3) Statement I is false but Statement II is true
• (4) Both Statement I and Statement II are true

What is the correct IUPAC name of the following compound?

• (1) 4-Ethyl-1-hydroxycyclopent-2-ene
• (2) 1-Ethyl-3-hydroxycyclopent-2-ene
• (3) 1-Ethylcyclopent-2-en-3-ol
• (4) 4-Ethylcyclopent-2-en-1-ol

A shows positive Lassaigne's test for N and its molar mass is 12(1)

B gives effervescence with aqueous NaHCO(3)

C gives fruity smell.


Identify A, B, and C from the following.

On combustion 0.210 g of an organic compound containing C, H and O gave 0.127 g \( H_2O \) and 0.307 g \( CO_2 \). The percentages of hydrogen and oxygen in the given organic compound respectively are:

• (1) 6.72, 39.87
• (2) 6.72, 53.41
• (3) 7.55, 43.85
• (4) 53.41, 39.6

HA \( (aq) \rightleftharpoons H^+ (aq) + A^- (aq) \)

The freezing point depression of a 0.1 m aqueous solution of a monobasic weak acid HA is 0.20 °C. The dissociation constant for the acid is
Given: \( K_f(H_2O) = 1.8 \, K kg mol^{-1} \), molality ≡ molarity

• (1) \( 1.1 \times 10^{-2} \)
• (2) \( 1.38 \times 10^{-3} \)
• (3) \( 1.90 \times 10^{-3} \)
• (4) \( 1.89 \times 10^{-1} \)

Match the LIST-I with LIST-II

LIST-I                            LIST-II

A. Carbocation            I. Species that can supply a pair of electrons.

B. C-Free radical         II. Species that can receive a pair of electrons.

C. Nucleophile            III. sp\(^2\) hybridized carbon with empty p-orbital.

D. Electrophile           IV. sp\(^2\)/sp\(^3\) hybridized carbon with one unpaired electron.

Choose the correct answer from the options given below:

• (1) A-III, B-III, C-I, D-IV
• (2) A-III, B-IV, C-II, D-I
• (3) A-IV, B-II, C-III, D-I
• (4) A-III, B-IV, C-I, D-II

In a first order decomposition reaction, the time taken for the decomposition of reactant to one fourth and one eighth of its initial concentration are \( t_1 \) and \( t_2 \) (s), respectively. The ratio \( t_1 / t_2 \) will be:

• (1) \(\frac{4}{3}\)
• (2) \(\frac{3}{4}\)
• (3) \(\frac{2}{3}\)
• (4) \(\frac{3}{2}\)

Match the LIST-I with LIST-II

LIST-I (Complex/Species)   LIST-II (Shape & magnetic moment)

A. \([Ni(CO)_4]\)                  I. Tetrahedral, 2.8 BM

B. \([Ni(CN)_4]^{2-}\)          II. Square planar, 0 BM

C. \([NiCl_4]^{2-}\)              III. Tetrahedral, 0 BM

D. \([MnBr_4]^{2-}\)            IV. Tetrahedral, 5.9 BM

Choose the correct answer from the options given below:

• (1) A-I, B-II, C-III, D-IV
• (2) A-III, B-II, C-I, D-IV
• (3) A-III, B-IV, C-II, D-I
• (4) A-IV, B-I, C-III, D-II

Which one of the following reactions will not lead to the desired ether formation in major proportion?

(iso-Bu = isobutyl, sec-Bu = sec-butyl, nPr = n-propyl, tBu = tert-butyl, Et = ethyl)

Correct statements for an element with atomic number 9 are

A. There can be 5 electrons for which \( m_s = +\frac{1}{2} \) and 4 electrons for which \( m_s = -\frac{1}{2} \)

B. There is only one electron in \( p_z \) orbital.

C. The last electron goes to orbital with \( n = 2 \) and \( l = 1 \).

D. The sum of angular nodes of all the atomic orbitals is 1.

Choose the correct answer from the options given below:

• (1) A and B Only
• (2) A, C and D Only
• (3) C and D Only
• (4) A and C Only

The number of species from the following that are involved in \( sp^3d^2 \) hybridization is \[ [Co(NH_3)_6]^{3+}, SF_6, [CrF_6]^{3-}, [CoF_6]^{3-}, [Mn(CN)_6]^{3-} \] and \[ [MnCl_6]^{3-} \]

• (1) 3
• (2) 4
• (3) 6
• (4) 5

When undergoes intramolecular aldol condensation, the major product formed is:

Choose the correct option for structures of A and B, respectively:

Choose the correct set of reagents for the following conversion:

• (1) \( Cl_2/Fe; Br_2/anhy. AlCl_3; aq. KOH \)
• (2) \( Br_2/Fe; Cl_2, \Delta; alc. KOH \)
• (3) \( Cl_2/anhy. AlCl_3; Br_2/Fe; alc. KOH \)
• (4) \( Br_2/anhy. AlCl_3; Cl_2, \Delta; aq. KOH \)

Which of the following binary mixture does not show the behavior of minimum boiling azeotropes?

• (1) \( CS_2 + CH_3COCH_3 \)
• (2) \( H_2O + CH_3COC_2H_5 \)
• (3) \( C_6H_5OH + C_6H_5NH_2 \)
• (4) \( CH_3OH + CHCl_3 \)

The atomic number of the element from the following with lowest \( 1^{st} \) ionization enthalpy is:

• (1) 87
• (2) 19
• (3) 32
• (4) 35

20 mL of sodium iodide solution gave 4.74 g silver iodide when treated with excess of silver nitrate solution. The molarity of the sodium iodide solution is _____ M. (Nearest Integer value)

(Given : Na = 23, I = 127, Ag = 108, N = 14, O = 16 g mol\(^{-1}\))

The equilibrium constant for decomposition of \( H_2O \) (g)
\[ H_2O(g) \rightleftharpoons H_2(g) + \frac{1}{2} O_2(g) \quad (\Delta G^\circ = 92.34 \, kJ mol^{-1}) \]

is \( 8.0 \times 10^{-3} \) at 2300 K and total pressure at equilibrium is 1 bar. Under this condition, the degree of dissociation (\( \alpha \)) of water is _____ \(\times 10^{-2}\) (nearest integer value).

[Assume \( \alpha \) is negligible with respect to 1]

Resonance in X\(_2\)Y can be represented as






The enthalpy of formation of X\(_2\)Y is 80 kJ mol\(^{-1}\), and the magnitude of resonance energy of X\(_2\)Y is:

The energy of an electron in first Bohr orbit of H-atom is \(-13.6\) eV. The magnitude of energy value of electron in the first excited state of Be\(^{3+}\) is _____ eV (nearest integer value)

Consider the following half cell reaction
\[ Cr_2O_7^{2-} (aq) + 6e^- + 14H^+ (aq) \longrightarrow 2Cr^{3+} (aq) + 7H_2O(1) \]

The reaction was conducted with the ratio of \[\frac{[Cr^{3+}]^2}{[Cr_2O_7^{2-}]} = 10^{-6}\]
The pH value at which the EMF of the half cell will become zero is _____ (nearest integer value)

[Given : standard half cell reduction potential \[E^\circ_{Cr_2O_7^{2-}, H^+/Cr^{3+}} = 1.33V, \quad \frac{2.303RT}{F} = 0.059V\]