1
JEE Main 2025 (Online) 22nd January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Radius of the first excited state of Helium ion is given as : $\mathrm{a}_0 \rightarrow$ radius of first stationary state of hydrogen atom.

A
$\mathrm{r}=\frac{\mathrm{a}_0}{4}$
B
$\mathrm{r}=2 \mathrm{a}_0$
C
$\mathrm{r}=4 \mathrm{a}_0$
D
$\mathrm{r=\frac{a_0}{2}}$
2
JEE Main 2025 (Online) 22nd January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The IUPAC name of the following compound is :

JEE Main 2025 (Online) 22nd January Morning Shift Chemistry - Basics of Organic Chemistry Question 26 English

A
5-Methoxycarbonly-2-methylhexanoic acid
B
Methyl-5-carboxy-2-methylhexanoate.
C
2-Carboxy-5-methoxycarbonylhexane.
D
Methyl-6-carboxy-2,5-dimethylhexanoate.
3
JEE Main 2025 (Online) 22nd January Morning Shift
Numerical
+4
-1
Change Language

Consider the following sequence of reactions :

JEE Main 2025 (Online) 22nd January Morning Shift Chemistry - Compounds Containing Nitrogen Question 17 English

Molar mass of the product formed $(\mathrm{A})$ is __________ $\mathrm{g} \mathrm{~mol}^{-1}$.

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4
JEE Main 2025 (Online) 22nd January Morning Shift
Numerical
+4
-1
Change Language

The number of molecules/ions that show linear geometry among the following is __________.

$\mathrm{SO}_2, \mathrm{BeCl}_2, \mathrm{CO}_2, \mathrm{~N}_3^{-}, \mathrm{NO}_2, \mathrm{~F}_2 \mathrm{O}, \mathrm{XeF}_2, \mathrm{NO}_2^{+}, \mathrm{I}_3^{-}, \mathrm{O}_3$

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