JEE Main 2026 Apr 5 Shift 2 — Chemistry

What volume of hydrogen gas at STP would be liberated by action of 50 mL of $\mathrm{H_2SO_4}$ of 50% purity (density $= 1.3\ \mathrm{g\ mL^{-1}}$) on 20 g of zinc?

Given : Molar mass of H, O, S, Zn are 1, 16, 32, 65 $\mathrm{g\ mol^{-1}}$ respectively.

Which of the following statement(s) is/are true?

A. If two orbitals have the same value of $(n+l)$, the orbital with lower value of $n$ will have lower energy.

B. Energies of the orbitals in the same subshell increase with increase in atomic number.

C. The size of $2p_x$ orbital is less than the size of $3p_x$ orbital.

D. Among 5f, 6s, 4d, 5p and 5d orbitals, none of the orbitals have 2 radial nodes.

Choose the correct answer from the options given below :

The covalent radii of atoms A and B are $r_A$ and $r_B$, respectively. The covalent bond length and total length of AB molecule are respectively

Consider the following data for the reaction

$\mathrm{X_2(g) + Y_2(g) \rightleftharpoons 2XY(g)}$

at 600 K. The $\Delta_r G^{\ominus}$ (in $\mathrm{kJ\ mol^{-1}}$) for the reaction is :

Compound	$\Delta_f H^{\ominus}_{600\,\mathrm{K}}$ ($\mathrm{kJ\ mol^{-1}}$)	$S^{\ominus}_{600\,\mathrm{K}}$ ($\mathrm{J\ mol^{-1}\ K^{-1}}$)
XY(g)	42	200
$\mathrm{X_2(g)}$	8	140
$\mathrm{Y_2(g)}$	80	250

The correct order of molar heat capacities measured at 298 K and 1 bar is :

The reaction $\mathrm{A(g) \rightleftharpoons B(g) + C(g)}$ was initiated with the amount 'a' of A(g). At equilibrium it is found that the amount of A(g) remaining is $(a - x)$ at a total pressure of p.

The equilibrium constant $K_p$ of the reaction can be calculated from the expression :

One half cell in a voltaic cell is constructed by dipping silver rod in $\mathrm{AgNO_3}$ solution of unknown concentration, other half cell is Zn rod dipped in 1 molar solution of $\mathrm{ZnSO_4}$.

A voltage of 1.60 V is measured at 298 K for this cell. What is the concentration of $\mathrm{Ag^+}$ ions used in terms of $\log x$ ($x = \mathrm{[Ag^+]}$)?

$E^{\ominus}_{\mathrm{Zn^{2+}/Zn}} = -0.76\ \mathrm{V}, \quad E^{\ominus}_{\mathrm{Ag^+/Ag}} = +0.80\ \mathrm{V}, \quad \dfrac{2.303RT}{F} = 0.059\ \mathrm{V}$

Given below are two statements :

Statement I : The number of pairs among $\mathrm{[Al_2O_3,\ Cr_2O_3]}$, $\mathrm{[Cl_2O_7,\ Mn_2O_7]}$, $\mathrm{[Na_2O,\ V_2O_3]}$ and $\mathrm{[CO,\ N_2O]}$ that contain oxides of same nature (acidic, basic, neutral or amphoteric) is 4.

Statement II : Among $\mathrm{Na_2O}$, $\mathrm{Al_2O_3}$, $\mathrm{CO}$ and $\mathrm{Cl_2O_7}$, the most basic and acidic oxides are $\mathrm{Na_2O}$ and $\mathrm{Cl_2O_7}$, respectively.

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

Given below are two statements :

Statement I : Aluminium upon reaction with NaOH forms $\mathrm{[Al(OH)_6]^{3-}}$ ion.

Statement II : The geometry of $\mathrm{ICl_4^-}$, $\mathrm{ClO_3^-}$ and $\mathrm{IBr_2^-}$ is square planar, pyramidal and linear respectively.

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

Given below are two statements :

Statement I : Presence of large number of unpaired electrons in transition metal atoms results in higher enthalpies of their atomisation.

Statement II : $d_{xy} = d_{xz} = d_{yz} < d_{x^2-y^2} = d_{z^2}$ and $d_{x^2-y^2} = d_{z^2} < d_{xy} = d_{xz} = d_{yz}$ are the d-orbital splittings in $\mathrm{[Fe(H_2O)_6]^{3+}}$ and $\mathrm{[Ni(Cl)_4]^{2-}}$ complex ions respectively.

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

Identify the correct statements from the following

A. $\mathrm{[Fe(C_2O_4)_3]^{3-}}$ is the most stable complex among $\mathrm{[Fe(OH)_6]^{3-}}$, $\mathrm{[Fe(C_2O_4)_3]^{3-}}$ and $\mathrm{[Fe(SCN)_6]^{3-}}$

B. The stability of $\mathrm{[Cu(NH_3)_4]^{2+}}$ is greater than that of $\mathrm{[Cu(en)_2]^{2+}}$

C. The hybridization of Fe in $\mathrm{K_4[Fe(CN)_6]}$ is $d^2sp^3$

D. $\mathrm{[Fe(NO_2)_3Cl_3]^{3-}}$ exhibits linkage isomerism

E. $\mathrm{NO_2^-}$ and $\mathrm{SCN^-}$ ligands are NOT ambidentate ligands

Choose the correct answer from the options given below :

Match List - I with List - II.

	List - I (Purification technique)		List - II (Used to separate)
A.	Simple distillation	I.	Steam volatile compound
B.	Fractional distillation	II.	Two liquids with large difference in boiling points
C.	Steam distillation	III.	Liquid decomposing at its boiling point
D.	Distillation under reduced pressure	IV.	Two liquids with close boiling points

Choose the correct answer from the options given below :

IUPAC name of the some alkenes are given below.

Find out the correct stability order.

A. 2-Methylbut-2-ene

B. cis-But-2-ene

C. 2,3-Dimethylbut-2-ene

D. Prop-1-ene

Choose the correct answer from the options given below :

Identify the correct IUPAC name of hydrocarbon ($x$) containing three primary carbon atoms and with molar mass 72 $\mathrm{g\ mol^{-1}}$.

Complete the following reaction sequence and give the name of major product 'P'.

skeletal structure of propanenitrile, $\mathrm{CH_3CH_2-C\equiv N}$

$\mathrm{CH_3CH_2-C\equiv N} \xrightarrow[\text{(iii) } \mathrm{Cl_2}/\text{Red P; (iv) } \mathrm{H_2O}]{\text{(i) } \mathrm{OH^-/H_2O/\Delta}\text{; (ii) } \mathrm{H_3O^+}} \mathrm{P}\ \text{(Major product)}$

Given below are two statements :

Statement I : The condensation reaction between $\mathrm{CH_3-CH{=}O}$ and $\mathrm{H_2N{-}NH{-}C({=}O){-}NH_2}$ under optimum pH will produce $\mathrm{CH_3-CH{=}N{-}C({=}O){-}NH{-}NH_2}$

Statement II : The molecule $\mathrm{Ph{-}CH(OH)(OCH_3)}$ will generate $\mathrm{Ph{-}CH{=}O}$ in the presence of dilute acid.

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

Given below are two statements :

Statement I : Heating benzamide with bromine in an ethanolic solution of sodium hydroxide will give benzylamine.

Statement II : Nitration of aniline with $\mathrm{HNO_3/H_2SO_4}$ at 288 K produces m-nitroaniline in higher amount than o-nitroaniline (pH adjusted).

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

Identify the incorrect statement about tertiary structure of proteins.

Given below are two statements :

Statement I :

two Haworth (pyranose ring) structures of glucose differing only in the orientation of the -OH group at the anomeric carbon C1 (one -OH drawn below the ring, the other above)

are two anomers of D-(+)-glucose.

Statement II : The open chain forms of D-glucose and D-fructose contain three similar chiral carbons at $\mathrm{C_3}$, $\mathrm{C_4}$ and $\mathrm{C_5}$.

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

A paper dipped in a dil. $\mathrm{H_2SO_4}$ solution of 'X' upon treatment with $\mathrm{SO_2}$ gas turns into green. The compound 'X' is :

The total number of unpaired electrons present in the $d^3$, $d^4$ (low spin), $d^5$ (high spin), $d^6$ (high spin) and $d^7$ (low spin) octahedral complex systems is ________.

RMgI when treated with ice cold water liberated a gas which occupied $1.4\ \mathrm{dm^3/g}$ at STP. The gas produced is further reacted with iodine in presence of $\mathrm{HIO_3}$ to give compound (X). Compound (X) in presence of Na and dry ether produced compound (Y). Molar mass of compound (Y) is ________ $\mathrm{g\ mol^{-1}}$. (Nearest integer)

20 g hemoglobin in a 1 L aqueous solution (A) at 300 K is separated from pure water by semi permeable membrane. At equilibrium the height of solution in a tube dipped in a solution (A) is found to be 80.0 mm higher than the tube dipped in water.

The molar mass of hemoglobin is ________ $\mathrm{kg\ mol^{-1}}$. (Nearest integer)

(Given : $g = 10\ \mathrm{m\ s^{-2}}$, $R = 8.3\ \mathrm{kPa\ dm^3\ K^{-1}\ mol^{-1}}$, density of solution $= 1000\ \mathrm{kg\ m^{-3}}$)

At 298 K, the molar conductivity of $x\%$ (w/w) MX solution (aqueous) is $123.5\ \mathrm{S\ cm^2\ mol^{-1}}$. The conductance of same solution is $1.9 \times 10^{-3}\ \mathrm{S}$. The value of $x$ is ________ $\times 10^{-2}$.

(Given : cell constant $= 1.3\ \mathrm{cm^{-1}}$; molar mass of MX is 75 $\mathrm{g\ mol^{-1}}$, density of aqueous solution of MX at 298 K is $1.0\ \mathrm{g\ mL^{-1}}$)

For a reaction $\mathrm{A \rightarrow P}$ at T K, the half life ($t_{1/2}$) is plotted as a function of initial concentration $[A]_0$ of A as given below.

straight-line plot through the origin of $t_{1/2}/\mathrm{s}$ (y-axis) versus $[A

_0/\mathrm{mol\ L^{-1}}$(x-axis); at$[A]_0 = 4 \times 10^{-3}$the half life is 240 s, and at$[A]_0 = 1.5 \times 10^{-3}$the half life is$x$]*

The value of $x$ in the given figure is ________ s (Nearest integer)