JEE Main 2024 (Online) 4th April Evening Shift

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

Vanillin compound obtained from vanilla beans, has total sum of oxygen atoms and \(\pi\) electrons is __________.

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

Correct order of stability of carbanion is :

Match List I with List II

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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 \(\mathrm{H}\) ...

Number of compounds / species from the following with non-zero dipole moment is _________.
$$\mathrm{BeCl}_2, \mathrm{BCl}_3, \mathrm{NF}_3, \mathrm{XeF}_4, \mathrm{CCl}_4, \mathrm{H}_2 \mathrm{O}, \mathrm{H}_2 \mathrm{~S}, \mathrm{HBr}, \m...

The number of species from the following that have pyramidal geometry around the central atom is _________
\(\mathrm{S}_2 \mathrm{O}_3^{2-}, \mathrm{SO}_4^{2-}, \mathrm{SO}_3^{2-}, \mathrm{S}_2 \mathrm{O}_7^{2-}\)

The equilibrium constant for the reaction
\(\mathrm{SO}_3(\mathrm{~g}) \rightleftharpoons \mathrm{SO}_2(\mathrm{~g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g})\)
is \(\mathrm{K}_{\mathrm{c}}=4.9 \times 10^{-2}\). The value of $$\mathrm{K}_{\math...

Consider the following reaction, the rate expression of which is given below
$$\begin{aligned} & \mathrm{A}+\mathrm{B} \rightarrow \mathrm{C} \\ & \text { rate }=\mathrm{k}[\mathrm{A}]^{1 / 2}[\mathrm{~B}]^{1 / 2} \end{aligned}$$
The reacti...

Phthalimide is made to undergo following sequence of reactions.

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

The number of unpaired d-electrons in \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}\) is ________.

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

If an iron (III) complex with the formula \(\left[\mathrm{Fe}\left(\mathrm{NH}_3\right)_x(\mathrm{CN})_y\right]^-\) has no electron in its \(e_g\) orbital, then the value of \(x+y\) is

A first row transition metal with highest enthalpy of atomisation, upon reaction with oxygen at high temperature forms oxides of formula \(\mathrm{M}_2 \mathrm{O}_{\mathrm{n}}\) (where \(\mathrm{n}=3,4,5\)). The 'spin-only' magnetic moment ...

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-friendly
E. is actually a type of Galvanic cell only
Choose the co...

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

Find out the major product formed from the following reaction. \([\mathrm{Me}:-\mathrm{CH}_3]\)

\(\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Br}+\mathrm{NaOH} \xrightarrow{\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}} \text { Product 'A' }\)

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

Product P is

In the above chemical reaction sequence "\(\mathrm{A}\)" and "\(\mathrm{B}\)" respectively are

Given below are two statements :
Statement I : The correct order of first ionization enthalpy values of \(\mathrm{Li}, \mathrm{Na}, \mathrm{F}\) and \(\mathrm{Cl}\) is \(\mathrm{Na}<\mathrm{Li}<\mathrm{Cl}<\mathrm{F}\).
Statement II : The c...

The correct order of the first ionization enthalpy is

When \(\mathrm{MnO}_2\) and \(\mathrm{H}_2 \mathrm{SO}_4\) is added to a salt \((\mathrm{A})\), the greenish yellow gas liberated as salt (A) is :

\(2.7 \mathrm{~kg}\) 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 i...

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

Choose the Incorrect Statement about Dalton's Atomic Theory

The maximum number of orbitals which can be identified with \(\mathrm{n}=4\) and \(m_l=0\) 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 :

Three moles of an ideal gas are compressed isothermally from \(60 \mathrm{~L}\) to \(20 \mathrm{~L}\) using constant pressure of \(5 \mathrm{~atm}\). Heat exchange \(\mathrm{Q}\) for the compression is - _________ Lit. atm.