1
JEE Main 2025 (Online) 24th January Evening Shift
Numerical
+4
-1
Change Language

The observed and normal molar masses of compound $\mathrm{MX}_2$ are 65.6 and 164 respectively. The percent degree of ionisation of $\mathrm{MX}_2$ is __________%. (Nearest integer)

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2
JEE Main 2025 (Online) 24th January Evening Shift
Numerical
+4
-1
Change Language

The possible number of stereoisomers for 5-phenylpent-4-en-2-ol is ________.

Your input ____
3
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

In an arithmetic progression, if $\mathrm{S}_{40}=1030$ and $\mathrm{S}_{12}=57$, then $\mathrm{S}_{30}-\mathrm{S}_{10}$ is equal to :

A
525
B
505
C
510
D
515
4
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Let $\mathrm{A}=\left[\mathrm{a}_{\mathrm{ij}}\right]$ be a square matrix of order 2 with entries either 0 or 1 . Let E be the event that A is an invertible matrix. Then the probability $\mathrm{P}(\mathrm{E})$ is :

A
$\frac{3}{8}$
B
$\frac{1}{8}$
C
$\frac{3}{16}$
D
$\frac{5}{8}$
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