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

In Carius method of estimation of halogen, 0.25 g of an organic compound gave 0.15 g of silver bromide ( AgBr ). The percentage of Bromine in the organic compound is ________ $\times 10^{-1} \%$ (Nearest integer).

(Given : Molar mass of Ag is 108 and Br is $80 \mathrm{~g} \mathrm{~mol}^{-1}$ )

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2
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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3
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 ________.

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4
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
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