JEE Main 2024 (Online) 30th January Morning Shift

This reduction reaction is known as:

Structure of 4-Methylpent-2-enal is :

Which of the following molecule/species is most stable?

Sugar which does not give reddish brown precipitate with Fehling's reagent, is :

Aluminium chloride in acidified aqueous solution forms an ion having geometry

Match List I with List II.

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : There is a considerable increase in covalent radius from \(\mathrm{N}\) to \(\mathrm{P}\). However from As to Bi only...

The total number of molecular orbitals formed from \(2 \mathrm{s}\) and \(2 \mathrm{p}\) atomic orbitals of a diatomic molecule is __________.

The rate of First order reaction is \(0.04 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}\) at 10 minutes and \(0.03 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}\) at 20 minutes after initiation. Half life of the reaction is _______ min...

Following is a confirmatory test for aromatic primary amines. Identify reagent (A) and (B).

The compound formed by the reaction of ethanal with semicarbazide contains _________ number of nitrogen atoms.

Choose the correct statements from the following :
(A) Ethane-1, 2-diamine is a chelating ligand.
(B) Metallic aluminium is produced by electrolysis of aluminium oxide in presence of cryolite.
(C) Cyanide ion is used as ligand for leaching ...

Diamagnetic Lanthanoid ions are :

Example of vinylic halide is :

The final product A, formed in the following multistep reaction sequence is :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : \(\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{Cl}\) is an example of allyl halide.
Reason (R) : Allyl halides are...

Compound A formed in the following reaction reacts with B gives the product C. Find out A and B.

In the given reactions, identify the reagent A and reagent B.

The \(\mathrm{pH}\) at which \(\mathrm{Mg}(\mathrm{OH})_2\left[\mathrm{~K}_{\mathrm{sp}}=1 \times 10^{-11}\right]\) begins to precipitate from a solution containing \(0.10 \mathrm{~M} \mathrm{~Mg}^{2+}\) ions is __________.

The Lassiagne's extract is boiled with dil \(\mathrm{HNO}_3\) before testing for halogens because,

Match List I with List II.

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If IUPAC name of an element is "Unununnium" then the element belongs to nth group of Periodic table. The value of n is ________.

On a thin layer chromatographic plate, an organic compound moved by \(3.5 \mathrm{~cm}\), while the solvent moved by \(5 \mathrm{~cm}\). The retardation factor of the organic compound is ________ \(\times 10^{-1}\).

\(2 \mathrm{MnO}_4^{-}+\mathrm{bI}^{-}+\mathrm{cH}_2 \mathrm{O} \rightarrow x \mathrm{I}_2+y \mathrm{MnO}_2+z \overline{\mathrm{O}} \mathrm{H}\)
If the above equation is balanced with integer coefficients, the value of \(z\) is ________.

Given below are two statements :
Statement (I) : The gas liberated on warming a salt with dil \(\mathrm{H}_2 \mathrm{SO}_4\), turns a piece of paper dipped in lead acetate into black, it is a confirmatory test for sulphide ion.
Statement (I...

What happens to freezing point of benzene when small quantity of napthalene is added to benzene?

The mass of sodium acetate \(\left(\mathrm{CH}_3 \mathrm{COONa}\right)\) required to prepare \(250 \mathrm{~mL}\) of \(0.35 \mathrm{~M}\) aqueous solution is ________ g. (Molar mass of \(\mathrm{CH}_3 \mathrm{COONa}\) is $$82.02 \mathrm{~g}...

\(0.05 \mathrm{~cm}\) thick coating of silver is deposited on a plate of \(0.05 \mathrm{~m}^2\) area. The number of silver atoms deposited on plate are ________ \(\times 10^{23}\). (At mass $$\mathrm{Ag}=108, \mathrm{~d}=7.9 \mathrm{~g} \ma...

Given below are two statements :
Statement (I) : The orbitals having same energy are called as degenerate orbitals.
Statement (II) : In hydrogen atom, 3p and 3d orbitals are not degenerate orbitals.
In the light of the above statements, cho...

An ideal gas undergoes a cyclic transformation starting from the point A and coming back to the same point by tracing the path \(\mathrm{A} \rightarrow \mathrm{B} \rightarrow \mathrm{C} \rightarrow \mathrm{A}\) as shown in the diagram abov...