JEE Main 2025 (Online) 28th January Evening Shift

The total number of compounds from below when treated with hot KMnO4, giving benzoic acid is:

Given below are two statements:Statement I: and are isomeric compounds.Statement II: and are functional group isomers.In the light of the above statements, choose the correct answer from the options given below:

Match List-I with List-II.

List - I (Saccharides)
List - II (Glycosidic-linkages found)


(A) Sucrose
(I) α 1 $-$ 4


(B) Maltose
(II) α 1 $-$ 4 and α 1 $-$ 6


(C) Lactose
(III) α 1 $-$ β 2
...

Identify correct conversion during acidic hydrolysis from the following :
(A) starch gives galactose.
(B) cane sugar gives equal amount of glucose and fructose.
(C) milk sugar gives glucose and galactose.
(D) amylopectin gives glucose and f...

Consider an elementary reaction
\(\mathrm{A}(\mathrm{~g})+\mathrm{B}(\mathrm{~g}) \rightarrow \mathrm{C}(\mathrm{~g})+\mathrm{D}(\mathrm{~g})\)
If the volume of reaction mixture is suddenly reduced to $\frac{1}{3}$ of its initial volume, ...

For bacterial growth in a cell culture, growth law is very similar to the law of radioactive decay. Which of the following graphs is most suitable to represent bacterial colony growth ? Where N - Number of Bacteria at any time, $\mathrm{N}_...

Identify correct statements :
(A) Primary amines do not give diazonium salts when treated with $\mathrm{NaNO}_2$ in acidic condition.
(B) Aliphatic and aromatic primary amines on heating with $\mathrm{CHCl}_3$ and ethanolic KOH form carbyla...

Match List - I with List - II.

List - I (Complex)
List - II (Hybridisation of central metal ion)


(A) [CoF6]3-
(I) d2sp3


(B) [NiCl4]2-
(II) sp3


(C) [Co(NH3)6]3+
(III) sp3d2


(D) ...

The spin only magnetic moment ( $\mu$ ) value (B.M.) of the compound with strongest oxidising power among $\mathrm{Mn}_2 \mathrm{O}_3, \mathrm{TiO}$ and VO is ____________ B.M. (Nearest integer).

Total number of molecules/species from following which will be paramagnetic is __________. $\mathrm{O}_2, \mathrm{O}_2^{+}, \mathrm{O}_2^{-}, \mathrm{NO}, \mathrm{NO}_2, \mathrm{CO}, \mathrm{K}_2\left[\mathrm{NiCl}_4\right],\left[\mathrm{Co...

The amphoteric oxide among $\mathrm{V}_2 \mathrm{O}_3, \mathrm{~V}_2 \mathrm{O}_4$ and $\mathrm{V}_2 \mathrm{O}_5$, upon reaction with alkali leads to formation of an oxide anion. The oxidation state of V in the oxide anion is :

Electrolysis of 600 mL aqueous solution of NaCl for 5 min changes the pH of the solution to 12 . The current in Amperes used for the given electrolysis is ___________ . (Nearest integer).

The major product of the following reaction is:

The product B formed in the following reaction sequence is:

Identify product [A], [B] and [C] in the following reaction sequence.
$\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{CH} \xrightarrow[\mathrm{H}_2]{\mathrm{Pd} / \mathrm{C}}[\mathrm{A}] \xrightarrow[\text { (ii) } \mathrm{Zn}, \mathrm{H}_2 \mathr...

Arrange the following in increasing order of solubility product :
$\mathrm{Ca}(\mathrm{OH})_2, \mathrm{AgBr}, \mathrm{PbS}, \mathrm{HgS}$

The purification method based on the following physical transformation is :$\underset{(X)}{\text { Solid }} \xrightarrow[]{\text { Heat }} \underset{(X)}{\text { Vapour }} \xrightarrow{\text { Cool }} \underset{(X)}{\text { Solid }}$

A group 15 element forms $\mathrm{d} \pi-\mathrm{d} \pi$ bond with transition metals. It also forms hydride, which is a strongest base among the hydrides of other group members that form $d \pi-d \pi$ bond. The atomic number of the element ...

Given below are two statements :Statement I : According to the Law of Octaves, the elements were arranged in the increasing order of their atomic number.Statement II : Meyer observed a periodically repeated pattern upon plotting physical pr...

Identify the inorganic sulphides that are yellow in colour :(A) $(NH_4)_2S$(B) $PbS$(C) $CuS$(D) $As_2S_3$(E) $As_2S_5$Choose the correct answer from the options given below :

Assume a living cell with 0.9% (w/w) of glucose solution (aqueous). This cell is immersed in another solution having equal mole fraction of glucose and water. (Consider the data upto first decimal place only) The cell will :

Concentrated nitric acid is labelled as $75 \%$ by mass. The volume in mL of the solution which contains 30 g of nitric acid is ______________.
Given : Density of nitric acid solution is $1.25 \mathrm{~g} / \mathrm{mL}$.

Which of the following is/are not correct with respect to energy of atomic orbitals of hydrogen atom?(A) 1s < 2p < 3d < 4s(B) 1s < 2s = 2p < 3s = 3p(C) 1s < 2s < 2p < 3s < 3p(D) 1s < 2s < 4s < 3dChoose the correct answer from the options gi...

An ideal gas undergoes a cyclic transformation starting from the point A and coming back to the same point by tracing the path A→B→C→D→A as shown in the three cases above.Choose the correct option regarding ΔU :

Consider the following data :
Heat of formation of $\mathrm{CO}_2(\mathrm{g})=-393.5 \mathrm{~kJ} \mathrm{~mol}{ }^{-1}$
Heat of formation of $\mathrm{H}_2 \mathrm{O}(\mathrm{l})=-286.0 \mathrm{~kJ} \mathrm{~mol}{ }^{-1}$
Heat of combustion...