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Chemistry

Given below are two statements :
Statement (I) : An element in the extreme left of the periodic table forms acidic oxides.
Statement (II) : Acid is formed during the reaction between water and oxide of a reactive element present in the extreme right of the periodic table,
In the light of the above statements, choose the correct answer from the options given below :

52.

Match the Compounds (List -I) with the appropriate Catalyst/ Reagents (List - II) for their reduction into corresponding amines.

Choose the correct answer from the options given below :

53.

Given below are two statements :
Statement (I) : Corrosion is an electrochemical phenomenon in which pure metal acts as an anode and impure metal as a cathode.
Statement (II) : The rate of corrosion is more in alkaline medium than in acidic medium.
In the light of the above statements, choose the correct answer from the options given below :

54.

The most stable carbocation from the following is :

55.

Given below are two statements:
Statement (I) : A spectral line will be observed for a \( 2p_x \to 2p_y \) transition.
Statement (II) : \( 2p_x \) and \( 2p_y \) (are degenerate orbitals.
In the light of the above statements, choose the correct answer from the options given below:

56.

Arrange the following compounds in increasing order of their dipole moment:
\( \mathrm{HBr} \), \( \mathrm{H_2S} \), \( \mathrm{NF_3} \) and \( \mathrm{CHCl_3} \)

57.

Match List - \( 1 \) with List - \( 11 \).

List – I (Partial Derivatives)	List – II (Thermodynamic Quantity)
(A) \( \left( \frac{\partial G}{\partial T} \right)_P \)	(I) \( Cp \)
(B) \( \left( \frac{\partial H}{\partial T} \right)_P \)	(II) \( -S \)
(C) \( \left( \frac{\partial G}{\partial P} \right)_T \)	(III) \( Cv \)
(D) \( \left( \frac{\partial U}{\partial T} \right)_V \)	(IV) \( V \)

Choose the correct answer from the options given below:

58.

The molar solubility(s) of zirconium phosphate with molecular formula \( (\mathrm{Zr}^{4+})_{3}(\mathrm{PO}_{4}^{3-})_{4} \) is given by relation:

59.

The maximum number of \( \mathrm{RBr} \) producing \( 2 \)-methylbutane by above sequence of reactions is _________. (Consider the structural isomers only)

60.

The maximum covalency of a non-metallic group \( 15 \) element ‘\( E \)’ with weakest \( E{-}E \) bond is:

61.

Identify the number of structure/s from the following which can be correlated to D-glyceraldehyde.

62.

Given below are two statements:
Statement (I): Nitrogen, sulphur, halogen and phosphorus present in an organic compound are detected by Lassaigne's Test.
Statement (II): The elements present in the compound are converted from covalent form into ionic form by fusing the compound with Magnesium in Lassaigne's test.
In the light of the above statements, choose the correct answer from the options given below:

63.

Identify the homoleptic complex(es) that is/are low spin.
(A) \( \left[\mathrm{Fe}(\mathrm{CN})_5\mathrm{NO}\right]^{2-} \) (B) \( \left[\mathrm{CoF}_6\right]^{3-} \) (C) \( \left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-} \) (D) \( \left[\mathrm{Cr}(\mathrm{H}_2\mathrm{O})_6\right]^{2+} \) (E) \( \left[\mathrm{Co}(\mathrm{NH}_3)_6\right]^{3+} \)

64.

The alkane from below having two secondary hydrogens is:

65.

Density of \( 3 \, \text{M} \) \( \mathrm{NaCl} \) solution is \( 1.25 \, \text{g/mL} \). The molality of the solution is:

66.

When sec-butylcyclohexane reacts with bromine in the presence of sunlight, the major product is:

67.

The species which does not undergo disproportionation reaction is:

68.

Consider the given figure and choose the correct option:

69.

Residue \( (A) + \mathrm{HCl{(dil)}} \rightarrow \) Compound \( (B) \)
Structure of residue \( (A) \) and compound \( (B) \) formed respectively is:

70.

The correct order of the following complexes in term of their crystal field stabilization energies is:

71.

Niobium \( (\mathrm{Nb}) \) and ruthenium \( (\mathrm{Ru}) \) have "x" and "y" number of electrons in their respective \( 4d \) orbitals. The value of \( x + y \) is \( \_\_\_\_\_\_\_\_\_\_ \).

72.

Consider the following cases of standard enthalpy of reaction \( \left(\Delta H_x^{\,\circ} \text{ in kJ mol}^{-1}\right) \)
\( \mathrm{C_2H_6(g)} + \tfrac{7}{2}\,\mathrm{O_2(g)} \rightarrow 2\mathrm{CO_2(g)} + 3\mathrm{H_2O(l)} \quad \Delta H_1^{\,\circ} = -1550 \)
\( \mathrm{C(graphite)} + \mathrm{O_2(g)} \rightarrow \mathrm{CO_2(g)} \quad \Delta H_2^{\,\circ} = -393.5 \)
\( \mathrm{H_2(g)} + \tfrac{1}{2}\,\mathrm{O_2(g)} \rightarrow \mathrm{H_2O(l)} \quad \Delta H_3^{\,\circ} = -286 \)
The magnitude of \( \Delta H_{f \, \text{C}_2\text{H}_6(g)}^{\circ} \) \( \_\_\_\_\_\_\_\_\_\_ \) \( \mathrm{kJ\,mol^{-1}} \) \( \text{(Nearest integer)} \).

73.

\( 20 \, \text{mL} \) of \( 2 \, \text{M} \) NaOH solution is added to \( 400 \, \text{mL} \) of \( 0.5 \, \text{M} \) NaOH solution. The final concentration of the solution is __________ \( \times 10^{-2} \, \text{M} \). (Nearest integer)

74.

The complex of \( \text{Ni}^{2+} \) ion and dimethyl glyoxime contains __________ number of Hydrogen \( (\text{H}) \) atoms.

75.

The compound with molecular formula \( \mathrm{C_6H_6} \), which gives only one monobromo derivative and takes up four moles of hydrogen per mole for complete hydrogenation has _____________ \( \pi \) electrons.

JEE Main 2025 22nd Jan Evening Shift

Mathematics Physics Chemistry

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Match List - \( 1 \) with List - \( 11 \).

List – I (Partial Derivatives)	List – II (Thermodynamic Quantity)
(A) \( \left( \frac{\partial G}{\partial T} \right)_P \)	(I) \( Cp \)
(B) \( \left( \frac{\partial H}{\partial T} \right)_P \)	(II) \( -S \)
(C) \( \left( \frac{\partial G}{\partial P} \right)_T \)	(III) \( Cv \)
(D) \( \left( \frac{\partial U}{\partial T} \right)_V \)	(IV) \( V \)

Choose the correct answer from the options given below:

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JEE Mains | PYQ