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Classification of Colloids - Based on Phases

Which is alwa...

Question

Which is always present in photochemical smog?

A

O_{3}

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B

C O_{2}

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C

S O_{2}

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D

C H_{4}

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Solution

The correct option is A $O_{3}$
Photochemical smog is formed from secondary pollutants. Secondary pollutants are formed due to the reaction between solar radiation and primary pollutants like nitrogen dioxide. Nitrogen oxides split into nitric oxide and nascent oxygen. Nascent oxygen forms ozone. Ozone, nitric oxide and PAN are the secondary pollutants
So, the correct answer is ' $O_{3}$ '

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Similar questions

Q. Which of the following compound(s) is/are not present in photochemical smog?

Q. Photochemical smog always contains:

Q. Pollutants present in the photochemical smog is/are :

Q. Match the following:

	List - I		List - II
A.	Green house gas	1.	$C O$
B.	Silent killer gas	2.	$C O_{2}$
C.	Photochemical smog	3.	$C F C s$
D.	Acid rain	4.	$O_{3}, N O_{2}$
		5.	$N_{2} O_{5}, S O_{3}$

Q. Identify the correct statements.
(i) Winter smog is reducing in nature due to presence of particulate carbon and

S O_{2}

.
(ii) The pollutant obtained from emission tubes of diesel engines is benzopyrene.
(iii) Photochemical smog is made up of PAN,

O_{3}

and oxides of nitrogen
(iv) CFCs are stable in troposphere and act as pollutants in stratosphere.

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