JEE Main · 2019 · 12 Apr 2019 · Shift 1 · Environmental Chemistry

The correct set of species responsible for the photochemical smog is :

(A) $NO, NO_{2}, O_{3}$ and hydrocarbons✓ Correct
(B) $CO_{2}, NO_{2} SO_{2}$ and hydrocarbons
(C) $N_{2}, NO_{2}$ and hydrocarbons
(D) $N_{2}, O_{2}, O_{3}$ and hydrocarbons

Answer: (A)

Solution

Photochemical smog forms when sunlight drives reactions among the oxides of nitrogen and unburnt hydrocarbons from vehicle exhaust. The species that take part are

NO

NO X_{2}

O X_{3}

and hydrocarbons, which together generate secondary oxidants such as PAN. That is the correct set responsible for photochemical smog.

JEE Main · 2019 · 12 Apr 2019 · Shift 1 · Single correct option

Practise more: all JEE Main PYQs on Environmental Chemistry →

More JEE Main questions on Environmental Chemistry

The possibility of photochemical smog formation is more at
JEE Main 2023View solution →
Which of these reactions is not a part of breakdown of ozone in stratosphere?
JEE Main 2023View solution →
The delicate balance of $CO_{2}$ and $O_{2}$ is NOT disturbed by:
JEE Main 2023View solution →
Match List-I with List-II

List-I (Industry):
(A) Steel plants
(B) Thermal power plants
(C) Fertilizer industries
(D) Paper mills

List-II (Waste Generated):
(I) Gypsum
(II) Fly ash
(III) Slag
(IV) Bio-degradable Wastes

Choose the correct answer from the options given below:
JEE Main 2023View solution →
Given below are two statements :

Statement I : If BOD is 4 ppm and dissolved oxygen is 8 ppm , then it is a good quality water.
Statement II : If the concentration of zinc and nitrate salts are 5 ppm each, then it can be a good quality water.
In the light of the above statements …
JEE Main 2023View solution →
Match List I with List II

LIST I | LIST II
A. Nitrogen oxides in air | I. Eutrophication
B. Methane in air | II. pH of rain water becomes 5.6
C. Carbon dioxide | III. Global warming
D. Phosphate fertilisers in water | IV. Acid rain

Choose the correct answer from the options giv …
JEE Main 2023View solution →