1
JEE Main 2023 (Online) 15th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Match List I with List II:

List I - (Monomer) List II - (Polymer)
(A) Tetrafluoroethene (I) Orlon
(B) Acrylonitrile (II) Natural rubber
(C) Caprolactam (III) Teflon
(D) Isoprene (IV) Nylon-6

Choose the correct answer from the options given below :
A
(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
B
(A)-(II), (B)-(III), (C)-(IV), (D)-(I)
C
(A)-(IV), (B)-(I), (C)-(II), (D)-(III)
D
(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
2
JEE Main 2023 (Online) 15th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The possibility of photochemical smog formation will be minimum at :
A
Mumbai in May
B
Kolkata in October
C
New-Delhi in August (Summer)
D
Srinagar, Jammu and Kashmir in January
3
JEE Main 2023 (Online) 15th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Decreasing order of reactivity towards electrophilic substitution for the following compounds is :

JEE Main 2023 (Online) 15th April Morning Shift Chemistry - Compounds Containing Nitrogen Question 27 English
A
$ \mathrm{a}>\mathrm{d}>\mathrm{e}>\mathrm{b}>\mathrm{c}$
B
$\mathrm{d}>\mathrm{a}>\mathrm{e}>\mathrm{c}>$ b
C
$\mathrm{c}>\mathrm{b}>\mathrm{a}>\mathrm{d}>\mathrm{e}$
D
$\mathrm{e}>\mathrm{d}>\mathrm{a}>\mathrm{b}>\mathrm{c}$
4
JEE Main 2023 (Online) 15th April Morning Shift
Numerical
+4
-1
Change Language
For a reversible reaction $\mathrm{A} \rightleftharpoons \mathrm{B}$, the $\Delta \mathrm{H}_{\text{forward reaction}} = 20 \mathrm{~kJ} \mathrm{~mol}^{-1}$. The activation energy of the uncatalysed forward reaction is $300 \mathrm{~kJ} \mathrm{~mol}^{-1}$. When the reaction is catalysed keeping the reactant concentration same, the rate of the catalysed forward reaction at $27^{\circ} \mathrm{C}$ is found to be same as that of the uncatalysed reaction at $327^{\circ} \mathrm{C}$.

The activation energy of the catalysed backward reaction is ___________ $\mathrm{kJ}~ \mathrm{mol}^{-1}$.
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