JEE Main 2023 (Online) 29th January Evening Shift | Environmental Chemistry Question 17 | Chemistry

The concentration of dissolved Oxygen in water for growth of fish should be more than $$\mathrm{\underline X }$$ ppm and Biochemical Oxygen Demand in clean water should be less than $$\mathrm{\underline Y }$$ ppm. X and Y in ppm are, respectively.

$$\mathrm{X}$$	$$\mathrm{Y}$$
4	15

$$\mathrm{X}$$	$$\mathrm{Y}$$
4	8

$$\mathrm{X}$$	$$\mathrm{Y}$$
6	12

$$\mathrm{X}$$	$$\mathrm{Y}$$
6	5

JEE Main 2023 (Online) 29th January Morning Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

Correct statement about smog is :

NO$$_2$$ is present in classical smog

Both NO$$_2$$ and SO$$_2$$ are present in classical smog

Photochemical smog has high concentration of oxidizing agents

Classical smog also has high concentration of oxidizing agents

JEE Main 2023 (Online) 25th January Morning Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

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 :

$$\mathrm{X = [O],Y = NO,A = {O_2},B = {O_3}}$$

$$\mathrm{X = {N_2}O,Y = [O],A = {O_3},B = NO}$$

$$\mathrm{X = {1 \over 2}{O_2},Y = N{O_2},A = {O_3},B = {O_2}}$$

$$\mathrm{X = NO,Y = [O],A = {O_2},B = {N_2}{O_3}}$$

JEE Main 2023 (Online) 24th January Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

Correct statement is :

An average human being consumes more food than air

An average human being consumes 100 times more air than food

An average human being consumes nearly 15 times more air than food

An average human being consumes equal amount of food and air

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