JEE Main 2024 Apr 9 Shift 2 — Chemistry

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

'A' and 'B' are respectively

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

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

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 $\mathrm{Zn \rightarrow Zn^{2+} + 2e^-}$

Choose the correct answer from the options given below:

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 :

The electronic configuration of Einsteinium is :

(Given atomic number of Einsteinium = 99)

Match List I with List II

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

Choose the correct answer from the options given below:

Match List I with List II

	LIST I		LIST II
A.	Melting Point [K]	I.	$\mathrm{Tl > In > Ga > Al > B}$
B.	Ionic Radius [$\mathrm{M^{+3}}$/pm]	II.	$\mathrm{B > Tl > Al \approx Ga > In}$
C.	$\Delta_i H_1$ [kJ mol$^{-1}$]	III.	$\mathrm{Tl > In > Al > Ga > B}$
D.	Atomic Radius [pm]	IV.	$\mathrm{B > Al > Tl > In > Ga}$

Choose the correct answer from the options given below:

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 :

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

Match List I with List II

	LIST I		LIST II
A.	$\mathrm{K_2[Ni(CN)_4]}$	I.	$\mathrm{sp^3}$
B.	$\mathrm{[Ni(CO)_4]}$	II.	$\mathrm{sp^3d^2}$
C.	$\mathrm{[Co(NH_3)_6]Cl_3}$	III.	$\mathrm{dsp^2}$
D.	$\mathrm{Na_3[CoF_6]}$	IV.	$\mathrm{d^2sp^3}$

Choose the correct answer from the options given below:

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.	Red colour appears
D.	2, 4 - DNP test	IV.	Blue, Green, Violet or Red colour appear

Choose the correct answer from the options given below:

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

three resonance structures — I: $\mathrm{CH_3-\overset{\ominus}{C}H-CH=CH-\overset{\oplus}{O}}$ (carbanion on the carbon next to $\mathrm{CH_3}$, positively charged oxygen); II: $\mathrm{CH_3-\overset{\oplus}{C}H-CH=CH-\overset{\ominus}{O}}$ (carbocation on the carbon next to $\mathrm{CH_3}$, negatively charged oxygen); III: $\mathrm{CH_3-CH=CH-CH=O}$ (neutral structure)

The incorrect statement regarding ethyne is

$\mathrm{C_6H_5-CH(CH_3)-CH(Br)(OCH_3)}$ (benzylic carbon bears $\mathrm{CH_3}$; adjacent carbon bears Br and $\mathrm{OCH_3}$)

$\xrightarrow[\Delta]{\mathrm{KCN\ (alc)}}$ Major Product 'P'

In the above reaction product 'P' is

Total number of stereo isomers possible for the given structure :

$\mathrm{CH_3-C(Br)=CH-CH_2-CH(Br)-C(CH_3)=C(Br)-CH_3}$ (a diene with Br on both double bonds and on the sp$^3$ carbon between them)

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 :

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

Major product of the following reaction is

benzene ring with CN at one position and $\mathrm{CO_2CH_3}$ para to it (methyl 4-cyanobenzoate)

$\xrightarrow[\text{(ii) } \mathrm{H_3O^+}]{\text{(i) } \mathrm{CH_3MgBr\ (excess)}}$

The incorrect statement about Glucose is :

Based on Heisenberg's uncertainty principle, the uncertainty in the velocity of the electron to be found within an atomic nucleus of diameter $10^{-15}$ m is ________ $\times\ 10^{9}\ \mathrm{ms^{-1}}$ (nearest integer)

[Given : mass of electron $= 9.1 \times 10^{-31}$ kg, Plank's constant $(h) = 6.626 \times 10^{-34}$ Js] (Value of $\pi = 3.14$)

Total number of electrons present in $(\pi^{*})$ molecular orbitals of $\mathrm{O_2}$, $\mathrm{O_2^{+}}$ and $\mathrm{O_2^{-}}$ is ________.

When $\Delta H_{\mathrm{vap}} = 30$ kJ/mol and $\Delta S_{\mathrm{vap}} = 75$ J mol$^{-1}$K$^{-1}$, then the temperature of vapour, at one atmosphere is ________ K.

The vapor pressure of pure benzene and methyl benzene at $27^{\circ}\mathrm{C}$ is given as 80 Torr and 24 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)

Consider the following first order gas phase reaction at constant temperature

$$\mathrm{A(g) \rightarrow 2B(g) + C(g)}$$

If the total pressure of the gases is found to be 200 torr after 23 sec. and 300 torr upon the complete decomposition of A after a very long time, then the rate constant of the given reaction is ________ $\times\ 10^{-2}\ \mathrm{s^{-1}}$ (nearest integer)

[Given : $\log_{10}(2) = 0.301$]

A transition metal 'M' among Sc, Ti, V, Cr, Mn and Fe has the highest second ionisation 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)

Consider the following test for a group-IV cation.

$\mathrm{M^{2+} + H_2S \rightarrow A}$ (Black precipitate) + byproduct

A + aqua regia $\rightarrow \mathrm{B + NOCl + S + H_2O}$

$\mathrm{B + KNO_2 + CH_3COOH \rightarrow C}$ + byproduct

The spin-only magnetic moment value of the metal complex C is ________ BM (Nearest integer)

a TLC plate 10 cm tall with the baseline 1 cm from the bottom and the solvent front 1 cm from the top; spot B lies above spot A between the baseline and the solvent front

In the given TLC, the distance of spot A & B are 5 cm & 7 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 ________.

Number of oxygen atoms present in chemical formula of fuming sulphuric acid is ________.

Number of compounds from the following which cannot undergo Friedel-Crafts reactions is: ________

toluene, nitrobenzene, xylene, cumene, aniline, chlorobenzene, m-nitroaniline, m-dinitrobenzene