JEE Main 2022 · 27 Jun · Shift 1 · Chemistry Q72

ChemistrySingle correct+4 / -1Question 72 of 90

Given below are two Statements :

Statement I : Classical smog occurs in cool humid climate. It is a reducing mixture of smoke, fog and sulphur dioxide.

Statement II : Photochemical smog has components, ozone, nitric oxide, acrolein, formaldehyde, PAN etc.

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

Both Statement I and Statement II are correct.

Both Statement I and Statement II are incorrect.

Statement I is correct but Statement II is incorrect.

Statement I is incorrect but Statement II is correct.

Answer and worked solution

Official answer: A

Statement I is correct: classical (London) smog forms in cool, humid air and is reducing.

Statement II is correct: photochemical smog contains $\mathrm{O_3}$ , NO, acrolein, formaldehyde and PAN.

(A)

Topics:Atmospheric pollution

JEE Main 2022 · 27 Jun · Shift 1, Chemistry question 72