JEE Main 2024 Apr 8 Shift 1 — Chemistry

Combustion of glucose $\mathrm{(C_6H_{12}O_6)}$ produces $\mathrm{CO_2}$ and water. The amount of oxygen (in g) required for the complete combustion of 900 g of glucose is :

[Molar mass of glucose in $\mathrm{g\ mol^{-1}}$ = 180]

Match List I with List II

	LIST I (Molecule)		LIST II (Shape)
A.	$\mathrm{NH_3}$	I.	Square pyramid
B.	$\mathrm{BrF_5}$	II.	Tetrahedral
C.	$\mathrm{PCl_5}$	III.	Trigonal pyramidal
D.	$\mathrm{CH_4}$	IV.	Trigonal bipyramidal

Choose the correct answer from the options given below:

For the given hypothetical reactions, the equilibrium constants are as follows :

$\mathrm{X \rightleftharpoons Y;\ K_1 = 1.0}$

$\mathrm{Y \rightleftharpoons Z;\ K_2 = 2.0}$

$\mathrm{Z \rightleftharpoons W;\ K_3 = 4.0}$

The equilibrium constant for the reaction $\mathrm{X \rightleftharpoons W}$ is

Thiosulphate reacts differently with iodine and bromine in the reactions given below:

$$\mathrm{2S_2O_3^{2-} + I_2 \rightarrow S_4O_6^{2-} + 2I^-}$$

$$\mathrm{S_2O_3^{2-} + 5Br_2 + 5H_2O \rightarrow 2SO_4^{2-} + 4Br^- + 10H^+}$$

Which of the following statement justifies the above dual behaviour of thiosulphate?

Among the following halogens

$\mathrm{F_2,\ Cl_2,\ Br_2}$ and $\mathrm{I_2}$

Which can undergo disproportionation reactions?

Give below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:

Assertion A: The stability order of +1 oxidation state of Ga, In and Tl is Ga < In < Tl.

Reason R: The inert pair effect stabilizes the lower oxidation state down the group.

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

Given below are two statements:

Statement I: $\mathrm{N(CH_3)_3}$ and $\mathrm{P(CH_3)_3}$ can act as ligands to form transition metal complexes.

Statement II: As N and P are from same group, the nature of bonding of $\mathrm{N(CH_3)_3}$ and $\mathrm{P(CH_3)_3}$ is always same with transition metals.

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

Match List I with List II

	LIST I (Elements)		LIST II (Properties in their respective groups)
A.	Cl, S	I.	Elements with highest electronegativity
B.	Ge, As	II.	Elements with largest atomic size
C.	Fr, Ra	III.	Elements which show properties of both metals and non-metal
D.	F, O	IV.	Elements with highest negative electron gain enthalpy

Choose the correct answer from the options given below:

Iron (III) catalyses the reaction between iodide and persulphate ions, in which

A. $\mathrm{Fe^{3+}}$ oxidises the iodide ion

B. $\mathrm{Fe^{3+}}$ oxidises the persulphate ion

C. $\mathrm{Fe^{2+}}$ reduces the iodide ion

D. $\mathrm{Fe^{2+}}$ reduces the persulphate ion

Choose the most appropriate answer from the options given below:

An octahedral complex with the formula $\mathrm{CoCl_3 \cdot nNH_3}$ upon reaction with excess of $\mathrm{AgNO_3}$ solution gives 2 moles of AgCl. Consider the oxidation state of Co in the complex is 'x'. The value of "x + n" is _________.

Number of Complexes with even number of electrons in $\mathrm{t_{2g}}$ orbitals is -

$\mathrm{[Fe(H_2O)_6]^{2+}, [Co(H_2O)_6]^{2+}, [Co(H_2O)_6]^{3+}, [Cu(H_2O)_6]^{2+}, [Cr(H_2O)_6]^{2+}}$

Match List I with List II

	LIST I (Name of the test)		LIST II (Reaction sequence involved) [M is metal]
A.	Borax bead test	I.	$\mathrm{MCO_3 \rightarrow MO \xrightarrow{Co(NO_3)_2,\ +\Delta} CoO \cdot MO}$
B.	Charcoal cavity test	II.	$\mathrm{MCO_3 \rightarrow MCl_2 \rightarrow M^{2+}}$
C.	Cobalt nitrate test	III.	$\mathrm{MSO_4 \xrightarrow[\Delta]{Na_2B_4O_7} M(BO_2)_2 \rightarrow MBO_2 \rightarrow M}$
D.	Flame test	IV.	$\mathrm{MSO_4 \xrightarrow[\Delta]{Na_2CO_3} MCO_3 \rightarrow MO \rightarrow M}$

Choose the correct answer from the options given below:

Match List I with List II

	LIST I (Compound)		LIST II (Colour)
A.	$\mathrm{Fe_4[Fe(CN)_6]_3 \cdot xH_2O}$	I.	Violet
B.	$\mathrm{[Fe(CN)_5NOS]^{4-}}$	II.	Blood Red
C.	$\mathrm{[Fe(SCN)]^{2+}}$	III.	Prussian Blue
D.	$\mathrm{(NH_4)_3PO_4 \cdot 12MoO_3}$	IV.	Yellow

Choose the correct answer from the options given below:

Given below are two statements:

Statement I:

Compound A — benzene ring bearing Cl, with one NO2 group ortho to Cl and another NO2 group para to Cl (1-chloro-2,4-dinitrobenzene skeleton)

IUPAC name of Compound A is 4-chloro-1,3-dinitrobenzene.

Statement II:

Compound B — benzene ring bearing NH2, with a CH3 group ortho to NH2 and a C2H5 group para to NH2

IUPAC name of Compound B is 4-ethyl-2-methylaniline.

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

In the given compound, the number of 2° carbon atom/s is __________.

$$\mathrm{CH_3-\underset{\underset{\mathrm{H}}{|}}{C}(CH_3)-\underset{\underset{\mathrm{H}}{|}}{C}H-\underset{\underset{\mathrm{H}}{|}}{C}(CH_3)-CH_3}$$

Which of the following are aromatic?

A.

naphthalene — two fused six-membered rings, fully conjugated

B.

styrene — benzene ring with a vinyl ($\mathrm{CH{=}CH_2}$) substituent

C.

ten-membered monocyclic ring with five alternating double bonds ([10

annulene)]*

D.

sixteen-membered monocyclic ring with eight alternating double bonds ([16

annulene)]*

Which among the following compounds will undergo fastest $\mathrm{S_N2}$ reaction.

Identify the major products A and B respectively in the following set of reactions.

1-methylcyclohexan-1-ol (cyclohexane ring with CH3 and OH on the same carbon); with $\mathrm{Conc.\ H_2SO_4,\ \Delta}$ it gives A, and with $\mathrm{CH_3COCl}$/Pyridine it gives B

Identify the product (P) in the following reaction:

cyclopentane ring bearing COOH

$\xrightarrow{\text{i) } \mathrm{Br_2}/\text{Red P, ii) } \mathrm{H_2O}}$ (P)

Fischer projection of an open-chain sugar — CHO at the top; C2: OH on the right; C3: OH on the left; C4: OH on the right; C5: OH on the right; CH2OH at the bottom (D-glucose)

The incorrect statement regarding the given structure is

A hypothetical electromagnetic wave is show below.

sinusoidal wave; a horizontal span of 1.5 pm is marked from the start of the wave up to the first crest

The frequency of the wave is $x \times 10^{19}$ Hz.

x = _________ (nearest integer)

Number of molecules from the following which are exceptions to octet rule is _________.

$\mathrm{CO_2,\ NO_2,\ H_2SO_4,\ BF_3,\ CH_4,\ SiF_4,\ ClO_2,\ PCl_5,\ BeF_2,\ C_2H_6,\ CHCl_3,\ CBr_4}$

vertical cylinder fitted with a piston; lower position A at 10 L and upper position B at 90 L

Consider the figure provided.

1 mol of an ideal gas is kept in a cylinder, fitted with a piston, at the position A, at 18° C. If the piston is moved to position B, keeping the temperature unchanged, then 'x' L atm work is done in this reversible process.

x = __________ L atm. (nearest integer)

[Given : Absolute temperature = °C + 273.15, R = 0.08206 $\mathrm{L\ atm\ mol^{-1}\ K^{-1}}$]

A solution containing 10 g of an electrolyte $\mathrm{AB_2}$ in 100 g of water boils at 100.52°C. The degree of ionization of the electrolyte ($\alpha$) is _________ $\times 10^{-1}$. (nearest integer)

[Given : Molar mass of $\mathrm{AB_2}$ = 200 $\mathrm{g\ mol^{-1}}$, $K_b$ (molal boiling point elevation const. of water) = 0.52 $\mathrm{K\ kg\ mol^{-1}}$, boiling point of water = 100°C ; $\mathrm{AB_2}$ ionises as $\mathrm{AB_2 \rightarrow A^{2+} + 2B^-}$]

Consider the following reaction

$\mathrm{A + B \rightarrow C}$

The time taken for A to become $1/4^{th}$ of its initial concentration is twice the time taken to become 1/2 of the same. Also, when the change of concentration of B is plotted against time, the resulting graph gives a straight line with a negative slope and a positive intercept on the concentration axis.

The overall order of the reaction is __________.

The 'spin only' magnetic moment value of $\mathrm{MO_4^{2-}}$ is __________ BM. (Where M is a metal having least metallic radii. among Sc, Ti, V, Cr, Mn and Zn).

(Given atomic number: Sc = 21, Ti = 22, V = 23, Cr = 24, Mn = 25 and Zn = 30)

If 279 g of aniline is reacted with one equivalent of benzenediazonium chloride, the maximum amount of aniline yellow formed will be _______ g. (nearest integer)

(consider complete conversion).

The number of optical isomers in following compound is:_________

three linearly fused six-membered rings (perhydroanthracene skeleton); Br on a ring-fusion carbon of the left ring and CH3 on a carbon of the right ring

Major product B of the following reaction has ________ $\pi$-bond.

ethylbenzene — benzene ring bearing a CH2CH3 group

$$\mathrm{C_6H_5CH_2CH_3 \xrightarrow[\Delta]{KMnO_4-KOH} (A) \xrightarrow{HNO_3/H_2SO_4} (B)}$$

Number of amine compounds from the following giving solids which are soluble in NaOH upon reaction with Hinsberg's reagent is ________.

eleven structures — (1) aniline $\mathrm{C_6H_5NH_2}$; (2) benzamide $\mathrm{C_6H_5CONH_2}$; (3) semicarbazide $\mathrm{H_2N{-}NH{-}CO{-}NH_2}$; (4) N-methylaniline $\mathrm{C_6H_5{-}NH{-}CH_3}$; (5) phenyl–NH– attached to a six-membered diene ring bearing NH2 (N-phenyl diamine structure); (6) urea $\mathrm{H_2N{-}CO{-}NH_2}$; (7) 2-methoxyaniline (benzene ring with NH2 and OCH3 on adjacent carbons); (8) propan-1-amine $\mathrm{CH_3CH_2CH_2NH_2}$; (9) triethylamine $\mathrm{(C_2H_5)_3N}$; (10) tertiary amine — N bearing ethyl, methyl and cyclohexylmethyl groups; (11) cyclohexylamine