JEE Main 2024 Apr 4 Shift 2 — Chemistry

Choose the Incorrect Statement about Dalton's Atomic Theory

The correct statement/s about Hydrogen bonding is/are

A. Hydrogen bonding exists when H is covalently bonded to the highly electro negative atom. B. Intermolecular H bonding is present in o-nitro phenol C. Intramolecular H bonding is present in HF. D. The magnitude of H bonding depends on the physical state of the compound. E. H-bonding has powerful effect on the structure and properties of compounds

Choose the correct answer from the options given below:

The equilibrium constant for the reaction

$$\mathrm{SO_3(g) \rightleftharpoons SO_2(g) + \frac{1}{2}\,O_2(g)}$$

is $\mathrm{K_c} = 4.9 \times 10^{-2}$. The value of $\mathrm{K_c}$ for the reaction given below is

$$\mathrm{2\,SO_2(g) + O_2(g) \rightleftharpoons 2\,SO_3(g)}$$

is :

Fuel cell, using hydrogen and oxygen as fuels,

A. has been used in spaceship B. has as efficiency of 40% to produce electricity C. uses aluminum as catalysts D. is eco-friendry E. is actually a type of Galvanic cell only

Choose the correct answer from the options given below:

For a strong electrolyte, a plot of molar conductivity against $(\text{concentration})^{1/2}$ is a straight line, with a negative slope, the correct unit for the slope is

Given below are two statements :

Statement I : The correct order of first ionization enthalpy values of Li, Na, F and Cl is Na < Li < Cl < F.

Statement II : The correct order of negative electron gain enthalpy values of Li, Na, F and Cl is Na < Li < F < Cl

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

The correct order of the first ionization enthalpy is

The number of species from the following that have pyramidal geometry around the central atom is ______

$$\mathrm{S_2O_3^{2-},\ SO_4^{2-},\ SO_3^{2-},\ S_2O_7^{2-}}$$

A first row transition metal in its +2 oxidation state has a spin-only magnetic moment value of 3.86 BM. The atomic number of the metal is

The number of unpaired d-electrons in $\mathrm{[Co(H_2O)_6]^{3+}}$ is ________.

If an iron (III) complex with the formula $\mathrm{\left[Fe(NH_3)_x(CN)_y\right]^-}$ has no electron in its $\mathrm{e_g}$ orbital, then the value of $x + y$ is

When $\mathrm{MnO_2}$ and $\mathrm{H_2SO_4}$ is added to a salt (A), the greenish yellow gas liberated as salt (A) is :

The adsorbent used in adsorption chromatography is/are -

A. silica gel B. alumina C. quick lime D. magnesia

Choose the most appropriate answer from the options given below :

Correct order of stability of carbanion is -

four cyclic carbanions — (a) cycloprop-2-en-1-yl anion (three-membered ring with one C=C, negative charge on the sp3 carbon); (b) cyclobutyl anion (four-membered saturated ring bearing a negative charge); (c) cyclopentyl anion (five-membered saturated ring bearing a negative charge); (d) cyclopentadienyl anion (five-membered ring with two C=C and a lone pair/negative charge on the fifth carbon)

reaction sequence — 1-methylcyclohex-1-ene $\xrightarrow{\text{"A"}}$ open-chain keto aldehyde $\mathrm{CH_3CO(CH_2)_4CHO}$ (6-oxoheptanal) $\xrightarrow{\text{"B"}}$ sodium carboxylate $\mathrm{NaOOC(CH_2)_4CHO}$ (sodium 6-oxohexanoate)

In the above chemical reaction sequence "A" and "B" respectively are

Find out the major product formed from the following reaction. [Me : $-\mathrm{CH_3}$]

3,5-dibromocyclopent-1-ene $\xrightarrow{\mathrm{Me_2NH\ (2\ equiv)}}$ ?

2-bromo-3-methyl-1-phenylbutane, $\mathrm{C_6H_5CH_2\text{-}CH(Br)\text{-}CH(CH_3)_2}$ $\xrightarrow[\Delta

{\mathrm{KOH(alc)}}$ major product "P"]*

Product P is

Common name of Benzene - 1, 2 - diol is -

$$\mathrm{CH_3-CH_2-CH_2-Br + NaOH \xrightarrow{C_2H_5OH} Product\ 'A'}$$

Product A $\xrightarrow[\mathrm{H^+}]{\mathrm{H_2O}}$ Product "B"

Product A $\xrightarrow[\mathrm{H_2O/H_2O_2/\overline{O}H}]{\text{Diborane}}$ Product "C"

Consider the above reactions, identify product B and product C.

Match List I with List II

	LIST I		LIST II
A.	α - Glucose and α - Galactose	I.	Functional isomers
B.	α - Glucose and β - Glucose	II.	Homologous
C.	α - Glucose and α - Fructose	III.	Anomers
D.	α - Glucose and α - Ribose	IV.	Epimers

Choose the correct answer from the options given below:

The maximum number of orbitals which can be identified with $n = 4$ and $m_l = 0$ is ________.

Number of compounds / species from the following with non-zero dipole moment is ________.

$$\mathrm{BeCl_2,\ BCl_3,\ NF_3,\ XeF_4,\ CCl_4,\ H_2O,\ H_2S,\ HBr,\ CO_2,\ H_2,\ HCl}$$

Three moles of an ideal gas are compressed isothermally from 60 L to 20 L using constant pressure of 5 atm. Heat exchange Q for the compression is – ________ Lit. atm.

2.7 kg of each of water and acetic acid are mixed. The freezing point of the solution will be $-x\ {}^\circ\mathrm{C}$. Consider the acetic acid does not dimerise in water, nor dissociates in water. $x =$ ________ (nearest integer)

[Given: Molar mass of water = $18\ \mathrm{g\ mol^{-1}}$, acetic acid = $60\ \mathrm{g\ mol^{-1}}$

$\mathrm{K_f}$ $\mathrm{H_2O}$ : $1.86\ \mathrm{K\ kg\ mol^{-1}}$

$\mathrm{K_f}$ acetic acid : $3.90\ \mathrm{K\ kg\ mol^{-1}}$

freezing point : $\mathrm{H_2O} = 273$ K, acetic acid $= 290$ K]

Consider the following reaction, the rate expression of which is given below

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

$$\text{rate} = k\,[\mathrm{A}]^{1/2}\,[\mathrm{B}]^{1/2}$$

The reaction is initiated by taking 1 M concentration of A and B each. If the rate constant (k) is $4.6 \times 10^{-2}\ \mathrm{s^{-1}}$, then the time taken for A to become 0.1 M is ________ sec. (nearest integer)

A first row transition metal with highest enthalpy of atomisation, upon reaction with oxygen at high temperature forms oxides of formula $\mathrm{M_2O_n}$ (where n = 3, 4, 5). The 'spin-only' magnetic moment value of the amphoteric oxide from the above oxides is ________ BM (near integer)

(Given atomic number : Sc : 21, Ti : 22, V : 23, Cr : 24, Mn : 25, Fe : 26, Co : 27, Ni : 28, Cu : 29, Zn : 30)

From 6.55 g of aniline, the maximum amount of acetanilide that can be prepared will be ________ $\times 10^{-1}$ g.

The total number of 'sigma' and 'Pi' bonds in 2-oxohex-4-ynoic acid is ________.

Vanillin compound obtained from vanilla beans, has total sum of oxygen atoms and $\pi$ electrons is ________.

Phthalimide is made to undergo following sequence of reactions.

$$\text{Phthalimide} \xrightarrow{\text{(i) KOH (ii) Benzylchloride}} \text{'P'}$$

Total number of $\pi$ bonds present in product 'P' is/are ________.