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Chemistry

Given below are two statements:
Statement I: \( \mathrm{PF}_{5} \) and \( \mathrm{BrF}_{5} \) both exhibit \( \mathrm{sp}^{3}\mathrm{d} \) hybridization.
Statement II: Both \( \mathrm{SF}_{6} \) and \( [\mathrm{Co}(\mathrm{NH}_{3})_{6}]^{3+} \) exhibit \( \mathrm{sp}^{3}\mathrm{d}^{2} \) hybridization.
In the light of the above statements, choose the correct answer from the options given below:

62.

The incorrect statements regarding enzymes are:
(A) Enzymes are biocatalysts
(B) Enzymes are non-specific and can catalyse different kinds of reactions
(C) Most Enzymes are globular proteins
(D) Enzyme-oxidase catalyses the hydrolysis of maltose into glucose.
Choose the correct answer from the option given below:

63.

The major products formed:

A and B respectively are:

64.

The incorrect statement regarding the geometrical isomers of \( 2 \)-butene is:

65.

The number of ions from the following that are expected to behave as oxidizing agent is:
\( \mathrm{Sn}^{4+}, \mathrm{Sn}^{2+}, \mathrm{Pb}^{2+}, \mathrm{Tl}^{3+}, \mathrm{Pb}^{4+}, \mathrm{Tl}^{+} \)

66.

The correct IUPAC name of \( [\mathrm{PtBr}_2(\mathrm{PMe}_3)_2] \) is:

67.

The ratio \( \frac{K_P}{K_C} \) for the reaction: \( \mathrm{CO(g)} + \tfrac{1}{2}\mathrm{O_2(g)} \rightleftharpoons \mathrm{CO_2(g)} \) is:

68.

Match List-I with List-II.

Choose the correct answer from the options given below:

69.

Match List-I with List-II.

Choose the correct answer from the options given below:

70.

Consider the above chemical reaction. Product “A” is:

71.

Molality \( (m) \) of \( 3 \, \mathrm{M} \) aqueous solution of \( \mathrm{NaCl} \) is:
(Given: Density of solution \( = 1.25 \, \mathrm{g \, mL^{-1}} \), Molar mass in \( \mathrm{g \, mol^{-1}} \): \( \mathrm{Na\!-\!23, \, Cl\!-\!35.5} \))

72.

How can an electrochemical cell be converted into an electrolytic cell?

73.

Consider the given reaction, identify the major product \( P \).

74.

During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in \( \mathrm{NH_4OH} \) solution when sodium carbonate extract was first acidified with dil. \( \mathrm{HNO_3} \) and then \( \mathrm{AgNO_3} \) solution was added. This indicates presence of:

75.

Identify the product in the following reaction.

76.

The correct arrangement for decreasing order of electrophilic substitution for above compounds is:

77.

The correct statement among the following, for a “chromatography” purification method is:

78.

Match List-I with List-II.

List-I Alkali Metal	List-II Emission Wavelength in nm
A. Li	(I) \( 589.2 \)
B. Na	(II) \( 455.5 \)
C. Rb	(III) \( 670.8 \)
D. Cs	(IV) \( 780.0 \)

Choose the correct answer from the options given below:

79.

Evaluate the following statements related to group \( 14 \) elements for their correctness.
(A) Covalent radius decreases down the group from C to Pb in a regular manner.
(B) Electronegativity decreases from C to Pb down the group gradually.
(C) Maximum covalence of C is \( 4 \) whereas other elements can expand their covalence due to presence of d orbitals.
(D) Heavier elements do not form \( p\pi - p\pi \) bonds.
(E) Carbon can exhibit negative oxidation states.
Choose the correct answer from the options given below:

80.

Arrange the following elements in the increasing order of number of unpaired electrons in it.
(A) Sc (B) Cr (C) V (D) Ti (E) Mn
Choose the correct answer from the options given below:

81.

The ratio of number of oxygen atoms to bromine atoms in the product Q is ______ \( \times 10^{-1} \).

82.

Number of carbocations from the following that are not stabilized by hyperconjugation is ______.

83.

Consider the following reactions
\(\text{NiS} + \text{HNO}_3 + \text{HCl} \rightarrow \text{A} + \text{NO} + \text{S} + \text{H}_2\text{O}\)

The number of protons that do not involve in hydrogen bonding in the product B is ______.

84.

For the reaction at \( 298 \, \mathrm{K} \), \( 2A + B \rightarrow C \), and \( \Delta H = 400 \, \mathrm{kJ\, mol^{-1}} \) and \( \Delta S = 0.2 \, \mathrm{kJ\, mol^{-1}\, K^{-1}} \). The reaction will become spontaneous above ______ \( \mathrm{K} \).

85.

An amine \( (X) \) is prepared by ammonolysis of benzyl chloride. On adding p-toluenesulphonyl chloride to it the solution remains clear. Molar mass of the amine \( (X) \) formed is ______ \( \mathrm{g\, mol^{-1}} \).
(Given molar mass in \( \mathrm{g\, mol^{-1}} \) \( \mathrm{C}:12, \mathrm{H}:1, \mathrm{O}:16, \mathrm{N}:14 \) )

86.

Total number of species from the following with central atom utilising \( \text{sp}^2 \) hybrid orbitals for bonding is __________
\( \mathrm{NH_3}, \ \mathrm{SO_2}, \ \mathrm{SiO_2}, \ \mathrm{BeCl_2}, \ \mathrm{C_2H_2}, \ \mathrm{C_2H_4}, \ \mathrm{BCl_3}, \ \mathrm{HCHO}, \ \mathrm{C_6H_6}, \ \mathrm{BF_3}, \ \mathrm{C_2H_4Cl_2} \)

87.

For hydrogen atom energy of an electron in first excited state is \( -3.4 \, \text{eV} \), K.E. of the same electron of hydrogen atom is \( x \, \text{eV} \). Value of \( x \) is __________ \( \times 10^{-1} \, \text{eV} \) (Nearest integer)

88.

Among \( \mathrm{VO_2^+}, \ \mathrm{MnO_4^-} \) and \( \mathrm{Cr_2O_7^{2-}} \), the spin-only magnetic moment value of the species with least oxidizing ability is ______ \( \text{BM} \) (Nearest integer).
(Given atomic member \( \mathrm{V} = 23 \), \( \mathrm{Mn} = 25 \), \( \mathrm{Cr} = 24 \))

89.

When \( x \times 10^{-2} \, \text{mL} \) methanol (molar mass \( = 32 \, \text{g} \); density \( = 0.792 \, \text{g}/ \, \text{cm}^{-3} \)) is added to \( 100 \, \text{mL} \) water (density \( = 1 \, \text{g} \,/ \text{cm}^{-3} \)), the following diagram is obtained.

\( x = \) __________ (nearest integer).
[Given: Molal freezing point depression constant of water at \( 273.15 \, \text{K} \) is \( 1.86 \, \text{K} \, \text{kg} \, \text{mol}^{-1} \)]

90.

Consider the two different first order reactions given below
\( \mathrm{A + B \rightarrow C} \) \( \text{(Reaction 1)} \)
\( \mathrm{P \rightarrow Q} \) \( \text{(Reaction 2)} \)
The ratio of the half life of Reaction \( 1 : \) Reaction \( 2 \) is \( 5 : 2 \). If \( t_1 \) and \( t_2 \) represent the time taken to complete \( \dfrac{2}{3} \)rd and \( \dfrac{4}{5} \)th of Reaction 1 and Reaction 2, respectively, then the value of the ratio \( t_1 : t_2 \) is ______ \( \times 10^{-1} \) (nearest integer)
[Given: \( \log_{10}(3) = 0.477 \) and \( \log_{10}(5) = 0.699 \)]

JEE Main 2024 6th April Evening Shift

Mathematics Physics Chemistry

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