Which of the following is NOT true of Smog?

the correct answer is Option 4: It is one the causes of acid rain.

 

• Option 1: It is caused by atmospheric pollution. True – Smog results from pollutants like nitrogen oxides (NOₓ), volatile organic compounds (VOCs), and particulate matter in the atmosphere.

• Option 2: It is also called smoky fog. True – The term "smog" is derived from "smoke + fog", originally referring to industrial air pollution.

• Option 3: It is harmful for human health. True – Smog can cause respiratory problems, eye irritation, and worsen conditions like asthma.

• Option 4: It is one of the causes of acid rain. Not true –

  • Smog and acid rain are both caused by air pollution, but smog itself does not cause acid rain.

  • Acid rain is caused specifically by sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) reacting with water vapor in the atmosphere — not by smog directly.