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1
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1

Correct statement about smog is :

A
NO$$_2$$ is present in classical smog
B
Both NO$$_2$$ and SO$$_2$$ are present in classical smog
C
Photochemical smog has high concentration of oxidizing agents
D
Classical smog also has high concentration of oxidizing agents
2
JEE Main 2023 (Online) 25th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Some reactions of NO$$_2$$ relevant to photochemical smog formation are

JEE Main 2023 (Online) 25th January Morning Shift Chemistry - Environmental Chemistry Question 14 English

Identify A, B, X and Y

A
$$\mathrm{X = [O],Y = NO,A = {O_2},B = {O_3}}$$
B
$$\mathrm{X = {N_2}O,Y = [O],A = {O_3},B = NO}$$
C
$$\mathrm{X = {1 \over 2}{O_2},Y = N{O_2},A = {O_3},B = {O_2}}$$
D
$$\mathrm{X = NO,Y = [O],A = {O_2},B = {N_2}{O_3}}$$
3
JEE Main 2022 (Online) 29th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which among the following pairs has only herbicides?

A
Aldrin and Dieldrin
B
Sodium chlorate and Aldrin
C
Sodium arsinate and Dieldrin
D
Sodium chlorate and sodium arsinite
4
JEE Main 2022 (Online) 28th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements:

Statement I : In polluted water values of both dissolved oxygen and $$\mathrm{BOD}$$ are very low.

Statement II : Eutrophication results in decrease in the amount of dissolved oxygen.

In the light of the above statements, choose the most appropriate answer from the options given below :

A
Both Statement I and Statement II are true
B
Both Statement I and Statement II are false
C
Statement I is true but Statement II is false
D
Statement I is false but Statement II is true
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