Given below are two statements : Statement (I) : Dimensions of specific heat is [L^2 T^-2 K^-1] . Statement (II) : Dimensions of gas constant is [ML^2 T^-1 K^-1] . In the light of the above statements, choose the most appropriate answer from the options given below.

Statement (I) is correct but statement (II) is incorrect

JEE Main 2024 April 06, Shift 2 Question Paper with Solutions

All 90 questions from the JEE Main 2024 (April 06, Shift 2) shift — Physics (30), Chemistry (30) and Mathematics (30) — each with the correct answer (answer key) and a step-by-step solution. Read it free online, or attempt the full paper as a timed mock test.

Physics PYQs 2024 Chemistry PYQs 2024 Mathematics PYQs 2024

Chemistry30 questions

Q31Single correctSolutions

Molality ( m ) of 3M aqueous solution of NaCl is : (Given : Density of solution

= 1.25

g m

L^{- 1}

, Molar mass in gmo

l^{- 1}

: Na

- 23

, Cl

- 35.5

)

(A)

1.9 m

(B)

3.85 m

(C)

2.79 m

(D)

2.90 m

Q32Single correctChemical and Ionic Equilibrium

The ratio

\frac{K _{P}}{K _{C}}

for the reaction :

CO_{(g)} + \frac{1}{2} O_{2 (g)} ⇌ CO_{2 (g)}

is :

(A)

\frac{1}{RT}

(B)

(RT)^{1/2}

(C)

RT

(D)

Q33Single correctRedox Reactions

Match List - I with List - II.

List-I	List-II
A. $N_{2 (g)} + O_{2 (g)} \to 2 NO_{(g)}$	I. Decomposition
B. $2 Pb(NO_{3})_{2 (s)} \to 2 PbO_{(s)} + 4 NO_{2 (g)} + O_{2 (g)}$	II. Displacement
C. $2 Na_{(s)} + 2 H_{2} O_{(l)} \to 2 NaOH_{(a q .)} + H_{2 (g)}$	III. Disproportionation
D. $2 NO_{2 (g)} + 2^{-} OH (a q .) \to NO_{2 (a q .)}^{-} + NO_{3 (a q .)}^{-} + H_{2} O_{(l)}$	IV. Combination

Choose the correct answer from the options given below :

(A)

(A)-(II), (B)-(III), (C)-(IV), (D)-(I)

(B)

(A)-(III), (B)-(II), (C)-(I), (D)-(IV)

(C)

(A)-(IV), (B)-(I), (C)-(II), (D)-(III)

(D)

(A)-(I), (B)-(II), (C)-(III), (D)-(IV)

Q34Single correctp-Block Elements

The number of ions from the following that are expected to behave as oxidising agent is :

Sn^{4 +}, Sn^{2 +}, Pb^{2 +}, Tl^{3 +}, Pb^{4 +}, Tl^{+}

(A)

(B)

(C)

(D)

Q35Single correctp-Block Elements

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

π - p π

bonds. (E) Carbon can exhibit negative oxidation states. Choose the correct answer from the options given below :

(A)

(A), (B) and (C) Only

(B)

(C), (D) and (E) Only

(C)

(D)

(A) and (B) Only

Q36Single correctPurification and Characterisation of Organic Compounds

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

(A)

Organic compounds run faster than solvent in the thin layer chromatographic plate.

(B)

R_{f}

is an integral value.

(C)

R_{f}

of a polar compound is smaller than that of a non-polar compound.

(D)

Non-polar compounds are retained at top and polar compounds come down in column chromatography.

Q37Single correctSome Basic Principles of Organic Chemistry

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

(A)

cis-2-butene and trans-2-butene are not interconvertible at room temperature.

(B)

cis-2-butene and trans-2-butene are stereoisomers.

(C)

cis-2-butene has less dipole moment than trans-2-butene.

(D)

trans-2-butene is more stable than cis-2-butene.

Q38Single correctElectrochemistry

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

(A)

Applying an external opposite potential lower than

E^{0}

cell.

(B)

Reversing the flow of ions in salt bridge.

(C)

Applying an external opposite potential greater than

E^{0}

cell-

(D)

Exchanging the electrodes at anode and cathode.

Q39Single correctd- and f-Block Elements

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 :

(A)

<

(D)

<

(C)

<

(B)

<

(E)

(B)

(C)

<

(E)

<

(B)

<

(A)

<

(D)

(C)

(A)

<

(D)

<

(C)

<

(E)

<

(B)

(D)

(B)

<

(C)

<

(D)

<

(E)

<

(A)

Q40Single correctCoordination Compounds

The correct IUPAC name of

[PtBr_{2} (PMe_{3})_{2}]

is :

(A)

dibromodi(trimethylphosphine)platinum(II)

(B)

bis(trimethylphosphine)dibromoplatinum(II)

(C)

dibromobis(trimethylphosphine)platinum(II)

(D)

bis[bromo(trimethylphosphine)]platinum(II)

Q41Single correctChemical Bonding and Molecular Structure

Given below are two statements : Statement I :

PF_{5}

and

BrF_{5}

both exhibit s

p^{3}

d hybridisation. Statement II : Both

SF_{6}

and

[Co(NH_{3})_{6}]^{3 +}

exhibit s

p^{3}

d^{2}

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

(A)

Statement I is true but Statement II is false

(B)

Statement I is false but Statement II is true

(C)

Both Statement I and Statement II are true

(D)

Both Statement I and Statement II are false

Q42Single correctCoordination Compounds

Match List I with List II

List - I (Reaction)	List - II (Type of redox reaction)
A. $TiCl_{4}$	I. $e^{4}, t_{2}^{4}$
B. $[FeO_{4}]^{2 -}$	II. $e^{1}, t_{2}^{0}$
C. $[FeCl_{4}]^{-}$	III. $e^{0}, t_{2}^{0}$
D. $[CoCl_{4}]^{2 -}$	IV. $e^{2}, t_{2}^{3}$

(A)

(A)-(III), (B)-(IV), (C)-(II), (D)-(I)

(B)

(A)-(IV), (B)-(III), (C)-(I), (D)-(II)

(C)

(A)-(III), (B)-(I), (C)-(IV), (D)-(II)

(D)

(A)-(I), (B)-(III), (C)-(IV), (D)-(II)

Q43Single correctSome Basic Principles of Organic Chemistry

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

Four benzene rings labelled (I), (II), (III), (IV). (I) is toluene: a benzene ring (drawn with three internal double-bond lines, Kekule) bearing a CH3 substituent at the top-right position. (II) is plain benzene drawn with a circle inside the hexagon, no substituent. (III) is anisole: a benzene ring (circle inside) bearing an OCH3 group at the top. (IV) is (trifluoromethyl)benzene: a benzene ring (Kekule) bearing a CF3 group at the top-right. Labels (I)-(IV) appear centered beneath each ring.

(A)

(III)

>

(I)

>

(II)

>

(IV)

(B)

(IV)

>

(I)

>

(II)

>

(III)

(C)

(III)

>

(IV)

>

(II)

>

(I)

(D)

(II)

>

(IV)

>

(III)

>

(I)

Q44Single correctAldehydes, Ketones and Carboxylic Acids

Consider the given reaction, identify the major product P.

CH_{3} - COOH (i) LiAlH_{4} (ii) PCC (iii) HCN / \overline{OH} (iv) H_{2} O / \overline{OH}, Δ "P"

(A)

Propanamide drawn as a condensed structure: CH3-CH2-C(=O)-NH2, with the carbonyl O shown double-bonded above the third carbon and NH2 to its right.

(B)

CH_{3} - CH_{2} - CH_{2} - OH

(C)

Lactic acid (2-hydroxypropanoic acid) drawn as a condensed structure: CH3-CH-COOH with an OH group drawn above the central CH carbon (the carbon bearing the OH is between the methyl and the carboxylic acid).

(D)

Butan-2-one drawn as a condensed structure: CH3-C(=O)-CH2CH3, with the carbonyl O double-bonded above the second carbon.

Q45Single correctHaloalkanes and Haloarenes

Consider the above chemical reaction. Product " A " is :

A cyclohexane ring (hexagon) attached at one vertex to a CH carbon; that CH bears a chlorine (Cl drawn above on the carbon next to the ring junction) and continues to a CH3 (top) and a -CH2-CH3 ethyl chain to the right, i.e. a secondary alkyl chloride built on a cyclohexyl group, reacting with + NaOH over H2O (with H2O above the reaction arrow) to give 'Major Product A'.

(A)

A cyclohexane ring attached to a quaternary-looking carbon bearing an OH (drawn below as 'OH') and a CH3 branch (top) plus a CH2CH3 ethyl chain ending in CH3 to the right; the tertiary/secondary alcohol formed by replacing Cl with OH at the same carbon of the substrate.

(B)

A cyclohexane ring attached to a chain with a CH3 branch and an OH group (OH drawn below); an isomeric cyclohexyl alcohol differing in the position of the OH and methyl relative to option 1.

(C)

A cyclohexane ring attached to a CH bearing an OH (drawn above as 'OH') with a CH3 to its right (the alcohol on the carbon directly bonded to the ring), i.e. a secondary alcohol 1-cyclohexyl substituted.

(D)

A cyclohexane ring attached to a chain bearing a CH3 (top) and an ethyl/propyl chain with an OH drawn below ('OH'); a positional isomer of the cyclohexyl alcohol distinct from options 1-3.

Q46Single correctOrganic Chemistry - Some Basic Principles and Techniques

The major products formed :
A and B respectively are:

Reaction scheme. Starting material: anisole drawn as a benzene ring with OCH3 substituent at top. Arrow labelled 'HNO3, H2SO4' over it leading to 'A'. Then a second arrow labelled 'Br2 (excess)' on top and 'Fe' below leading to 'B'.

(A)

Benzene ring with OCH3 at top, two Br atoms at the 2 and 6 positions (both ortho to OCH3), and NO2 at the 4 (para) position. This is 2,6-dibromo-4-nitroanisole.

(B)

Two structures joined by 'and'. Left: benzene ring with OCH3 at top and NO2 at ortho position. Right: benzene ring with OCH3 at top, NO2 at para position and Br at another position.

(C)

Benzene ring with OCH3 at top and NO2 at the para (bottom) position only (p-nitroanisole).

(D)

Benzene ring with OCH3 at top, Br substituent on the ring and NO2 at the bottom para position.

Q47Single correctOrganic Chemistry - Amines

Identify the product (A) in the following reaction.

Reaction scheme. Aniline drawn as benzene ring with NH2 substituent. Reagent steps listed: (i) NaNO2 + HCl, (ii) Cu2Cl2, (iii) NaOH, 623 K, 300 atm, (iv) H+. Product labelled (A).

(A)

Benzene ring with Cl at top (para) and OH at bottom; 4-chlorophenol.

(B)

Benzene ring with NH2 at top and Cl at bottom (para); 4-chloroaniline.

(C)

Benzene ring with NH2 at top and OH at bottom (para); 4-aminophenol.

(D)

Benzene ring with OH substituent only; phenol.

Q48Single correctInorganic Chemistry - Qualitative Analysis

During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in N

H_{3}

OH solution when sodium carbonate extract was first acidified with dil. HN

O_{3}

and then AgN

O_{3}

solution was added. This indicates presence of :

(A)

^{-}

(B)

^{-}

(C)

^{-}

(D)

_{3}^{2 -}

Q49Single correctInorganic Chemistry - s-Block Elements

Match List I with List II

(A)

(A)-(I), (B)-(IV), (C)-(III), (D)-(I)

(B)

(A)-(I), (B)-(IV), (C)-(III), (D)-(II)

(C)

(A)-(IV), (B)-(III), (C)-(I), (D)-(II)

(D)

(A)-(III), (B)-(I), (C)-(IV), (D)-(II)

Q50Single correctBiological Chemistry - Biomolecules

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 :

Two benzene ring structures joined by 'and'. Left structure: ring with OCH3 at top, NO2 and Br substituents on the ring. Right structure: ring with OCH3 at top, NO2 substituent, and Br at the bottom position.

(A)

(B), (C) and (D)

(B)

(B) and (D)

(C)

(A), (B) and (C)

(D)

(B) and (C)

Q51NumericalInorganic Chemistry - Hydrogen and its Compounds

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

Two reactions. (1) NiS + HNO3 + HCl -> A + NO + S + H2O. (2) A + NH4OH + dimethylglyoxime (two H3C-C=N-OH groups joined by a vertical bond between the central carbons) -> B + NH4Cl + H2O.

Q52NumericalPhysical Chemistry - Atomic Structure

For hydrogen atom, energy of an electron in first excited state is

- 3.4

eV. K.E. of the same electron of hydrogen atom is xeV. Value of x is ______

\times 1 0^{- 1}

eV. (Nearest integer)

Q53NumericalPhysical Chemistry - Solutions

An amine (X) is prepared by ammonolysis of benzyl chloride. On adding p-toluenesulphonyl chloride to the solution remains clear. Molar mass of the amine (X) formed is ______ gmo

l^{- 1}

. (Given molar mass is integer)

Q54NumericalPhysical Chemistry - Chemical Thermodynamics

For the reaction at 298 K,

2 A + B \to C

Δ H = 400

kJ mo

l^{- 1}

and

Δ S = 0.2

kJ mo

l^{- 1}

K^{- 1}

. The reaction will become spontaneous above ______ K.

Q55NumericalPhysical Chemistry - Chemical Kinetics

Consider two different first order reactions given below

A + B \to C

(Reaction 1)

P \to Q

(Reaction 2) The ratio of

t_{1}

and

t_{2}

represent the time taken to complete

2/ 3^{rd}

and

4 5^{th}

of Reaction 1 and Reaction 2, respectively, then the value of the ratio

t_{1} : t_{2}

is ______

\times 1 0^{- 1}

(nearest integer). [Given :

lo g_{10} (3) = 0.477

and

lo g_{10} (5) = 0.699

]

Q56NumericalInorganic Chemistry - d- and f-Block Elements

Total number of

VO_{4}^{3 -}, MnO_{4}^{-}

and

Cr_{2} O_{7}^{2 -}

, the spin-only magnetic moment value of the species with least oxidising ability is ______ BM (Nearest integer). (Given atomic number V = 23, Mn = 25, Cr = 24)

Q57NumericalOrganic Chemistry - Some Basic Principles and Techniques

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

A set of drawn carbocations (positively charged carbon centres), including: a cyclopentadienyl-type cation, structures labelled (tert-Butyl)(tert-Butyl) with a CH3 bearing positive charge, a CH2-OCH3 cation, a small cyclic cation, and a nitrogen-containing N=CH2 cation. Each carries a '+' charge marking the carbocation centre.

Q58NumericalPhysical Chemistry - Solutions

When ' z '

\times 1 0^{- 2}

mL methanol (molar mass

= 32

g; density

= 0.792

g/c

m^{3}

) is added to 100 mL water (density

= 1

g/c

m^{3}

), the following diagram is obtained.

z =

______ (nearest integer). [Given : Molal freezing point depression constant of water at 273.15 K is 1.86 K kg mo

l^{- 1}

]

Vapour pressure (y-axis) vs Temperature/K (x-axis) diagram. Two intersecting curves labelled 'Frozen system' and 'Methanolic solution' (and 'Water'). Temperature axis marks 270.65 and 273.15 K at the relevant intersection points.

Q59NumericalInorganic Chemistry - Chemical Bonding and Molecular Structure

Total number of species from the following with central atom utilising

s p^{3}

hybrid orbitals for bonding is ______.

NH_{3}

SO_{2}

SiO_{2}

BeCl_{2}

C_{2} H_{2}

C_{2} H_{4}

BCl_{3}

HCHO

C_{4} H_{6}

BF_{3}

C_{2} H_{4} Cl_{2}

Q60NumericalOrganic Chemistry - Some Basic Principles and Techniques

The ratio of number of oxygen atoms to bromine atoms in the product Q is ______

\times 1 0^{- 1}

Reaction scheme. Anisole drawn as benzene ring with OCH3 at top. Arrow labelled 'HNO3, H2SO4' leading to P (major product). Then arrow labelled '2Br2, Fe' leading to Q (major product).

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JEE Main 2024 April 06, Shift 2 Question Paper with Solutions

Physics30 questions

Chemistry30 questions

Mathematics30 questions

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