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Chemistry

Which of the following compound can give positive iodoform test when treated with aqueous KOH solution followed by potassium hypoiodite.

62.

Match List I with List II

List-I (Test)	List-II (Observation)
(A) \( \mathrm{Br_2} \) water test	I. Yellow orange or orange red precipitate formed
(B) Ceric ammonium nitrate test	II. Reddish orange colour disappears
(C) Ferric chloride test	III. Reel colour appears
(D) \( 2,4 \) - DNP test	IV. Blue, Green, Violet or Red colour appear

Choose the correct answer from the option given below:

63.

In the above reaction product 'P' is

64.

The electronic configuration of Einsteinium is:
(Given atomic number of Einsteinium = \( 99 \))

65.

The correct stability order of the following resonance structures of \( \mathrm{CH_3-CH=CH-CHO} \) is

66.

Which out of the following is a correct equation to show change in molar conductivity with respect to concentration for a weak electrolyte, if the symbols carry their usual meaning:

67.

Total number of stereo isomers possible for the given structure:

68.

Match List I with List II

List-I (Element)	List-II (Electronic Configuration)
(A) N	I. \( [\mathrm{Ar}]\,3 d^{10}\,4s^{2}\,4p^{5} \)
(B) S	II. \( [\mathrm{Ne}]\,3s^{2}\,3p^{4} \)
(C) Br	III. \( [\mathrm{He}]\,2s^{2}\,2p^{3} \)
(D) Kr	IV. \( [\mathrm{Ar}]\,3d^{10}\,4s^{2}\,4p^{6} \)

69.

The incorrect statement about Glucose is:

70.

Match List I with List II

List-I	List-II
(A) Melting Point [K]	I.) Tl > In > Ga > Al > B
(B) Ionic Radius [M³⁺/pm]	II.) B > Tl > Al ≈ Ga > In
(C) \(Δ_iH_1\) [kJ mol^-1]	III.) Tl > In > Al > Ga > B
(D) Atomic Radius [pm]	IV.) B > Al > Tl > In > Ga

Choose the correct answer from the options given below:

71.

The correct increasing order for bond angles among \( \mathrm{BF_3} \), \( \mathrm{PF_3} \) and \( \mathrm{ClF_3} \) is:

72.

The coordination environment of \( \mathrm{Ca^{2+}} \) ion in its complex with \( \mathrm{EDTA^{4-}} \) is:

73.

The incorrect statement regarding ethyne is

74.

For a sparingly soluble salt \( \mathrm{AB_2} \), the equilibrium concentrations of \( \mathrm{A^{2+}} \) ions and \( \mathrm{B^-} \) ions are \( 1.2 \times 10^{-4} \, \mathrm{M} \) and \( 0.24 \times 10^{-3} \, \mathrm{M} \), respectively. The solubility product of \( \mathrm{AB_2} \) is:

75.

Major product of the following reaction is

76.

The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 'A' × \( 10^{12} \) hertz and that has a radiant intensity in that direction \(\displaystyle \frac{1}{'B'} \) watt per steradian.
'A' and 'B' are respectively

77.

Give below are two statements:
Statement I : The higher oxidation states are more stable down the group among transition elements unlike p-block elements.
Statement II : Copper can not liberate hydrogen from weak acids.
In the light of the above statements, choose the correct answer from the options given below:

78.

Which of the following compounds will give silver mirror with ammoniacal silver nitrate?
A. Formic acid
B. Formaldehyde
C. Benzaldehyde
D. Acetone
Choose the correct answer from the options given below:

79.

Match List I with List II

List-I (Cell)	List-II (Use/Property/Reaction)
(A) Leclanche cell	(I). Converts energy of combustion into electrical energy
(B) Ni - Cd cell	(II). Does not involve any ion in solution and is used in hearing aids
(C) Fuel cell	(III). Rechargeable
(D) Mercury cell	(IV). Reaction at anode \( \mathrm{Zn} \rightarrow \mathrm{Zn}^{2+} + 2e^{-} \)

Choose the correct answer from the options given below:

80.

Match List-I with List II

List-I	List-II
(A) \( \mathrm{K_2[Ni(CN)_4]} \)	(I). \( \text{sp}^{3} \)
(B) \( \mathrm{[Ni(CO)_4]} \)	(II). \( \text{sp}^{3}{d}^{2} \)
(C) \( \mathrm{[Co(NH3)_6]Cl_3} \)	(III). \( \text{dsp}^{2} \)
(D) \( \mathrm{Na_3[CoF_6]} \)	(IV). \( \text{d}^{2}{{sp}^{3}} \)

Choose the correct answer from the options given below:

81.

When \( \Delta H_{\text{vap}} = 30 \, \text{kJ/m ol} \) and \( \Delta S_{\text{vap}} = 75 \, \text{J mol}^{-1} \, \text{K}^{-1} \), then the temperature of vapor, at one atmosphere is _____ \( \text{K} \).

82.

Based on Heisenberg’s uncertainty principle, the uncertainty in the velocity of the electron to the found within an atomic nucleus of diameter \( 10^{-15} \, \text{m} \) is _____ \( \times 10^{9} \, \text{ms}^{-1} \) (nearest integer)
[Given : mass of electron \( = 9.1 \times 10^{-31} \, \text{kg} \). Plank's constant \( (h) = 6.626 \times 10^{-34} \, \text{Js} \)] (Value of \( \pi = 3.14 \))

83.

The vapor pressure of pure benzene and methyl benzene at \( 27^\circ \text{C} \) is given as \( 80 \, \text{Torr} \) and \( 24 \, \text{Torr} \), respectively. The mole fraction of methyl benzene in vapor phase, in equilibrium with an equimolar mixture of those two liquids (ideal solution) at the same temperature is _____ \( \times 10^{-2} \) (nearest integer)

84.

Number of compounds from the following which cannot undergo Friedel-Crafts reactions is :
toluene, nitrobenzene, xylene, cumene, aniline, chlorobenzene, m-nitroaniline, m-dinitrobenzene

85.

In the given TLC, the distance of spot A & B are \( 5 \, \text{cm} \) and \( 7 \, \text{cm} \) from the bottom of TLC plate, respectively. \( R_f \) value of B is \( x \times 10^{-1} \) times more than A. The value of \( x \) is

86.

Number of oxygen atoms present in chemical formula of fuming sulphury acid is

87.

A transition metal 'M' among Sc, Ti, V, Cr, Mn and Fe has the highest second ionization enthalpy. The spin-only magnetic moment value of \( \mathrm{M^{+}} \) ion is ______ BM (Near integer)
(Given atomic number Sc : \( 21 \), Ti : \( 22 \), V : \( 23 \), Cr : \( 24 \), Mn : \( 25 \), Fe : \( 26 \)))

88.

Consider the following test for a group-\( \text{IV} \) cation.
\( \text{M}^{2+} + \text{H}_2\text{S} \rightarrow \text{A} \) (Black precipitate) \( + \) byproduct
\( \text{A} + \) aqua regia \( \rightarrow \text{B} + \text{NOCl} + \text{S} + \text{H}_2\text{O} \)
\( \text{B} + \text{KNO}_2 + \text{CH}_3\text{COOH} \rightarrow \text{C} + \) byproduct
The spin-only magnetic moment value of the metal complex \( \text{C} \) is __ \( \text{BM} \) (Nearest integer)

89.

Toal number of electrons present in \( (\pi^{*}) \) molecular orbitals of \( \text{O}_2 \), \( \text{O}_2^{+} \) and \( \text{O}_2^{-} \) is

90.

Consider the following first order gas phase reaction at constant temperature
\( \text{A(g)} \rightarrow 2\text{B(g)} + \text{C(g)} \)
If the total pressure of the gases is found to be \( 200 \, \text{torr} \) after \( 23 \, \text{sec} \) and \( 300 \, \text{torr} \) upon the complete decomposition of \( \text{A} \) after very long time, then the rate constant of the given reaction is ______ \( \times 10^{-2} \, \text{s}^{-1} \) (nearest integer)
[Given: \( \log_{10}(2) = 0.301 \)]

JEE Main 2024 9th April Evening Shift

Mathematics Physics Chemistry

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