1
JEE Main 2022 (Online) 28th July Evening Shift
Numerical
+4
-1
Change Language

A sample of $$0.125 \mathrm{~g}$$ of an organic compound when analyzed by Duma's method yields $$22.78 \mathrm{~mL}$$ of nitrogen gas collected over $$\mathrm{KOH}$$ solution at $$280 \mathrm{~K}$$ and $$759 \mathrm{~mm}\, \mathrm{Hg}$$. The percentage of nitrogen in the given organic compound is __________. (Nearest integer)

Given :

(a) The vapour pressure of water of $$280 \mathrm{~K}$$ is $$14.2 \mathrm{~mm} \,\mathrm{Hg}$$.

(b) $$\mathrm{R}=0.082 \mathrm{~L}$$ atm $$\mathrm{K}^{-1} \mathrm{~mol}^{-1}$$

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2
JEE Main 2022 (Online) 28th July Evening Shift
Numerical
+4
-1
Out of Syllabus
Change Language

On reaction with stronger oxidizing agent like $$\mathrm{KIO}_{4}$$, hydrogen peroxide oxidizes with the evolution of $$\mathrm{O}_{2}$$. The oxidation number of $$\mathrm{I}$$ in $$\mathrm{KIO}_{4}$$ changes to __________.

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3
JEE Main 2022 (Online) 28th July Evening Shift
Numerical
+4
-1
Change Language

For a reaction, given below is the graph of $$\ln k$$ vs $${1 \over T}$$. The activation energy for the reaction is equal to ____________ $$\mathrm{cal} \,\mathrm{mol}^{-1}$$. (nearest integer)

(Given : $$\mathrm{R}=2 \,\mathrm{cal} \,\mathrm{K}^{-1} \,\mathrm{~mol}^{-1}$$ )

JEE Main 2022 (Online) 28th July Evening Shift Chemistry - Chemical Kinetics and Nuclear Chemistry Question 36 English

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4
JEE Main 2022 (Online) 28th July Evening Shift
Numerical
+4
-1
Out of Syllabus
Change Language

Among the following the number of curves not in accordance with Freundlich adsorption isotherm is ________.

(a) JEE Main 2022 (Online) 28th July Evening Shift Chemistry - Surface Chemistry Question 29 English 1

(b) JEE Main 2022 (Online) 28th July Evening Shift Chemistry - Surface Chemistry Question 29 English 2

(c) JEE Main 2022 (Online) 28th July Evening Shift Chemistry - Surface Chemistry Question 29 English 3

(d) JEE Main 2022 (Online) 28th July Evening Shift Chemistry - Surface Chemistry Question 29 English 4

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