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Chemistry

Match List-I with List-II.

Choose the correct answer from the options given below:

Given below are two statements:
Given: Molar mass of \( \mathrm{C, H, O, Cl} \) are \( 12 \), \( 1 \), \( 16 \) and \( 35.5 \, \mathrm{g\, mol^{-1}} \), respectively:
Statement-I: In \( 30\% \) (w/w) solution of methanol in \( \mathrm{CCl_{4}} \) (at \( T \, \mathrm{K} \)), the mole fraction of \( \mathrm{CCl_{4}} \) is equal to \( 0.33 \).
Statement-II: Mixture of methanol and \( \mathrm{CCl_{4}} \) shows positive deviation from Raoul’s law.
In the light of the above statements, choose the correct answer from the options given below:

53.

Bromine trifluoride autoionizes to form \( \mathrm{BrF_{2}^{\oplus}} \) and \( \mathrm{BrF_{4}^{\oplus}} \). The shapes of the cation and anion are respectively ______ and ______

54.

Which of the following statements are not correct?
A. For water, magnitude of \( K_b \) is more than the magnitude of \( K_f \).
B. The elevation in boiling point of water when a non-volatile solute is added to it is larger in magnitude than its depression in freezing point.
C. Osmotic pressure measurement is preferred over any other colligative property to determine molar mass of proteins and polymers.
D. The dimerised form of benzoic acid in benzene is
Choose the correct answer from the options given below:

55.

Consider the following reactions in which all the reactants and products are present in gaseous state.
\( 2\,\mathrm{XY} \rightleftharpoons \mathrm{X_2} + \mathrm{Y_2};\ K_1 = 2.5 \times 10^{5} \)
\( \mathrm{XY} + \tfrac{1}{2}\mathrm{Z_2} \rightleftharpoons \mathrm{XYZ};\ K_2 = 5 \times 10^{-3} \)
The value of \( K_3 \) for the equilibrium \( \tfrac{1}{2}\mathrm{X_2} + \tfrac{1}{2}\mathrm{Y_2} + \tfrac{1}{2}\mathrm{Z_2} \rightleftharpoons \mathrm{XYZ} \) is:

56.

Given at \( 298\,\mathrm{K} \):\( E^\ominus_{\mathrm{Fe^{2+}/Fe}} = X \) Volt
\( E^\ominus_{\mathrm{Fe^{3+}/Fe}} = Y \) Volt
The \( E^\ominus_{\mathrm{Fe^{3+}/Fe^{2+}}} \) in Volt at \( 298\,\mathrm{K} \) is given by:

57.

Given below are two statements:
\( R = 8.314\ \mathrm{J\,K^{-1}\,mol^{-1}} \) and \( 1\ \mathrm{cal} = 4.2\ \mathrm{J} \)
Statement-I: When \( Ea = 12.6\ \mathrm{kcal/\,mol} \), the room temperature rate constant is doubled by a \( 10^\circ \mathrm{C} \) increase in temperature (\( 298\ \mathrm{K} \) to \( 308\ \mathrm{K} \)).
Statement-II: For a first order reactions \( \mathrm{A \rightarrow B} \),

Here \( [A]_0 \) is the initial concentration of \( \mathrm{A} \) and \( t_{1/2} \) is half-life of reaction.
In the light of the above statements, choose the correct answer from the options given below:

58.

Match List-I with List-II.

Choose the correct answer from the options given below:

59.

Find the correct statements related to group \( 15 \) hydrides.
A. Reducing nature increases from \( \mathrm{NH_3} \) to \( \mathrm{BiH_3} \)
B. Tendency to donate lone pair of electrons decreases from \( \mathrm{NH_3} \) to \( \mathrm{BiH_3} \)
C. The stability of hydrides decreases from \( \mathrm{NH_3} \) to \( \mathrm{BiH_3} \)
D. \( \mathrm{HEH} \) bond angle decreases from \( \mathrm{NH_3} \) to \( \mathrm{SbH_3} \) (\( \mathrm{E} = \) Elements of group \( 15 \))
Choose the correct answer from the options given below:

60.

Given below are two statements:
Statement-I: The number of pairs among \( [\mathrm{Ti}^{4+}, \mathrm{V}^{2+}] \), \( [\mathrm{V}^{2+}, \mathrm{Mn}^{2+}] \), \( [\mathrm{Mn}^{2+}, \mathrm{Fe}^{3+}] \) and \( [\mathrm{V}^{2+}, \mathrm{Cr}^{2+}] \) in which both ions are coloured is \( 3 \).
Statement-II: The number of pairs among \( [\mathrm{La}^{3+}, \mathrm{Yb}^{2+}] \), \( [\mathrm{Lu}^{3+}, \mathrm{Ce}^{4+}] \) and \( [\mathrm{Ac}^{3+}, \mathrm{Lr}^{3+}] \) ions in which both are diamagnetic is \( 3 \).
In the light of the above statements, choose the correct answer from the options given below:

61.

Given below are two statements for catalytic properties of transition metals.
Statement-I: First row transition metals which act as catalyst utilise their \( 3d \) electrons only for formation of bonds between reactant molecules and atoms on the surface of catalyst.
Statement-II: There is increase in the concentration of reactants on the surface of catalyst which strengthens the bonds in reacting molecules.
In the light of the above statements, choose the correct answer from the options given below:

62.

Given below are two statements:
Statement-I: Vapours of the liquid with higher boiling point condense before vapours of the liquid with lower boiling points in fractional distillation.
Statement-II: The vapours rising up in the fractionating column become richer in high boiling component of the mixture.
In the light of the above statements, choose the correct answer from the options given below:

63.

The major product of which of the following reaction is not obtained by rearrangement reaction?

64.

The total number of aromatic compounds/species from the following is:

65.

n-Butane on monochlorination under photochemical condition gives an optically active compound “P”. “P” on further chlorination gives dichloro compounds.
The number of dichloro compounds obtained (ignore stereoisomers) is:

66.

Given below are two statements:

Statement-I: Due to increase in van der Waals forces, the order of boiling points is \( \mathrm{CH_3CH_2CH_2I} > \mathrm{CH_3CH_2I} > \mathrm{CH_3} \).

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

67.

Consider the following reaction.

The major product \((P)\) formed is:

68.

Which statements are True?
A. In Hoffmann bromamide degradation, \( 4 \) moles of \( \mathrm{NaOH} \) and \( 2 \) moles of \( \mathrm{Br_2} \) are consumed per mole of an amide.
B. Hoffmann bromamide reaction is not given by alkyl amides.
C. Primary amines can be synthesized by Hoffmann bromamide degradation.
D. Secondary amide on reaction with \( \mathrm{Br_2} \) and \( \mathrm{NaOH} \) will give secondary amine.
E. The by-products of Hoffmann degradation are \( \mathrm{Na_2CO_3} \), \( \mathrm{NaBr} \) and \( \mathrm{H_2O} \).
Choose the correct answer from the options given below:

69.

The incorrect statement from the following with respect to carbohydrates is:

70.

Which of the following amino acid will give violet coloured complex with neutral ferric chloride solution?

71.

Number of paramagnetic complexes among the following is ______:
\( \left[\mathrm{MnBr_4}\right]^{2-},\ \left[\mathrm{NiCl_4}\right]^{2-},\ \left[\mathrm{Ni(CN)_4}\right]^{2-},\ \left[\mathrm{Ni(CO)_4}\right],\ \left[\mathrm{CoF_6}\right]^{3-},\ \left[\mathrm{Fe(CN)_6}\right]^{4-},\ \left[\mathrm{Mn(CN)_6}\right]^{3-},\ \left[\mathrm{Ti(CN)_6}\right]^{3-},\ \left[\mathrm{Cu(H_2O)_6}\right]^{2+},\ \left[\mathrm{Co(C_2O_4)_3}\right]^{3-} \)

72.

‘\( x \)’ is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous chloride. ‘\( y \)’ is the major product obtained from the benzene by reacting it with ethanoyl chloride in the presence of anhydrous \( \mathrm{AlCl_3} \). Product (major) obtained by heating \( x \) and \( y \) in the presence of alkali is \( z \). Total number of \( \pi \)(pi) electrons in \( z \) is ______.

73.

Consider two radiations of wavelength.
\(1\). \(\lambda_1=2000\mathring A\) \(2\). \(\lambda_2=6000 \mathring A\)
The ratio of the energies of these two radiations \( \left( \dfrac{E_1}{E_2} \right) \) is ______. (Nearest integer)

74.

Consider the reaction \( 2\mathrm{H_2S(g)} + 3\mathrm{O_2} \rightarrow 2\mathrm{H_2O(l)} + 2\mathrm{SO_2(g)} \)
The magnitude of enthalpy change for the reaction in \( \mathrm{kJ\,mol^{-1}} \) is ______. (Nearest integer)
[Given: \( \Delta_\mathrm{f}H^\ominus(\mathrm{H_2S}) = -20.1 \ \mathrm{kJ\,mol^{-1}} \), \( \Delta_\mathrm{f}H^\ominus(\mathrm{H_2O}) = -286.0 \ \mathrm{kJ\,mol^{-1}} \) and \( \Delta_\mathrm{f}H^\ominus(\mathrm{SO_2}) = -297.0 \ \mathrm{kJ\,mol^{-1}} \)]

75.

Solid carbon, \( \mathrm{CaO} \) and \( \mathrm{CaCO_3} \) are mixed and allowed to attain equilibrium at \( T \ \mathrm{K} \).
\( \mathrm{CaCO_3(s)} \rightleftharpoons \mathrm{CaO(s)} + \mathrm{CO_2(g)}; \ K_{p1} = 0.08 \ \mathrm{atm} \)
\( \mathrm{C(s)} + \mathrm{CO_2(g)} \rightleftharpoons 2\mathrm{CO(g)}; \ K_{p2} = 2 \ \mathrm{atm} \)
The partial pressure of \( \mathrm{CO} \) is ______ \( \times 10^{-1} \) \( \mathrm{atm} \).

JEE Main 2026 8th April Evening Shift

Mathematics Physics Chemistry

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Consider the reaction \( 2\mathrm{H_2S(g)} + 3\mathrm{O_2} \rightarrow 2\mathrm{H_2O(l)} + 2\mathrm{SO_2(g)} \)
The magnitude of enthalpy change for the reaction in \( \mathrm{kJ\,mol^{-1}} \) is ______. (Nearest integer)
[Given: \( \Delta_\mathrm{f}H^\ominus(\mathrm{H_2S}) = -20.1 \ \mathrm{kJ\,mol^{-1}} \), \( \Delta_\mathrm{f}H^\ominus(\mathrm{H_2O}) = -286.0 \ \mathrm{kJ\,mol^{-1}} \) and \( \Delta_\mathrm{f}H^\ominus(\mathrm{SO_2}) = -297.0 \ \mathrm{kJ\,mol^{-1}} \)]

JEE MainsJEE AdvanceBITSATJEE Mains | PYQ

JEE Mains JEE Advance BITSAT
JEE Mains | PYQ