JEE Main 2025 (Online) 3rd April Morning Shift

Number of molecules from below which cannot give iodoform reaction is :
Ethanol, Isopropyl alcohol, Bromoacetone, 2-Butanol, 2-Butanone, Butanal, 2-Pentanone, 3-Pentanone, Pentanal and 3-Pentanol.

\(\text {Identify the correct statements from the following. }\)

\(\text {Choose the correct answer from the options given below: }\)

\(\text { The least acidic compound, among the following is: }\)

\(\text { Which of the following is the correct structure of L-Fructose? }\)

In the following system, $\mathrm{PCl}_5(\mathrm{~g}) \leftrightharpoons \mathrm{PCl}_3(\mathrm{~g})+\mathrm{Cl}_2(\mathrm{~g})$ at equilibrium, upon addition of xenon gas at constant T & p , the concentration of

Given below are two statements :
Statement I : A catalyst cannot alter the equilibrium constant $\left(\mathrm{K}_{\mathrm{c}}\right)$ of the reaction, temperature remaining constant.
Statement II : A homogenous catalyst can change the equi...

In a reaction $A+B \rightarrow C$, initial concentrations of $A$ and $B$ are related as $[A]_0=8[B]_0$. The half lives of $A$ and $B$ are 10 min and 40 min , respectively. If they start to disappear at the same time, both following first or...

\(\text {Identify }[\mathrm{A}],[\mathrm{B}] \text { and }[\mathrm{C}] \text {, respectively in the following reaction sequence : }\)

\(\text { In the following reactions, which one is NOT correct? }\)

The correct order of the complexes $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+}(\mathrm{A}),\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}(\mathrm{B}),\left[\mathrm{Co}(\mathrm{CN...

\(\text { Match the LIST-I with LIST-II }\)


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The number of optical isomers exhibited by the iron complex $(\mathrm{A})$ obtained from the following reaction is___________.
\(\mathrm{FeCl}_3+\mathrm{KOH}+\mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4 \rightarrow \mathrm{~A}\)

The metal ions that have the calculated spin-only magnetic moment value of 4.9 B.M. are :
A. $\mathrm{Cr}^{2+}$
B. $\mathrm{Fe}^{2+}$
C. $\mathrm{Fe}^{3+}$
D. $\mathrm{Co}^{2+}$
E. $\mathrm{Mn}^{3+}$
Choose the correct answer from the optio...

Consider the following reactions
$$ \begin{aligned} & \mathrm{A}+\underset{\substack{ \text { Little } \\ \text { amount }}}{\mathrm{NaCl}}+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{CrO}_2 \mathrm{Cl}_2+\text { Side Products } \\ & \ma...

Correct order of limiting molar conductivity for cations in water at 298 K is :

\(\text { Which compound would give 3-methyl-6-oxoheptanal upon ozonolysis? }\)

Given below are two statements :
Statement I : The N - N single bond is weaker and longer than that of P - P single bond.
Statement II : Compounds of group 15 elements in +3 oxidation states readily undergo disproportionation reactions.
In ...

Which of the following statements are correct?
A. The process of adding an electron to a neutral gaseous atom is always exothermic.
B. The process of removing an electron from an isolated gaseous atom is always endothermic.
C. The $1^{\text...

2 moles each of ethylene glycol and glucose are dissolved in 500 g of water. The boiling point of the resulting solution is:
(Given : Ebullioscopic constant of water $=0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$ )

Which of the following properties will change when system containing solution 1 will become solution 2 ?

Among $10^{-9} \mathrm{~g}$ (each) of the following elements, which one will have the highest number of atoms?
Element: $\mathrm{Pb}, \mathrm{Po}, \mathrm{Pr}$ and Pt

\(\text {During estimation of nitrogen by Dumas' method of compound } \mathrm{X}(0.42 \mathrm{~g})\)
_________mL of $\mathrm{N}_2$ gas will be liberated at STP. (nearest integer) (Given molar mass in $\mathrm{g}~ \mathrm{mol}^{-1}: \mathr...

0.5 g of an organic compound on combustion gave 1.46 g of $\mathrm{CO}_2$ and 0.9 g of $\mathrm{H}_2 \mathrm{O}$. The percentage of carbon in the compound is _______________. (Nearest integer)
[Given : Molar mass (in $\left.\mathrm{g} \math...

Which of the following postulate of Bohr's model of hydrogen atom is not in agreement with quantum mechanical model of an atom?

Given :
$$ \begin{aligned} & \left.\Delta \mathrm{H}^{\ominus}{ }_{\text {sub }}[\mathrm{C} \text { (graphite })\right]=710 \mathrm{~kJ} \mathrm{~mol}^{-1} \\ & \Delta_{\mathrm{C}-\mathrm{H}} \mathrm{H}^{\ominus}=414 \mathrm{~kJ} \mathrm{~m...