Chemistry: Environmental Chemistry: UPSC Previous Year Questions (Science and Technology)
1 previous year UPSC Prelims question on Chemistry: Environmental Chemistry (Science and Technology). Choose an option to see the answer and explanation.
Explanations state facts as of the year each question was asked; words like “recently” refer to that year.
Showing 1–1 of 1 question
UPSC 2003Science and Technology · Chemistry: Environmental Chemistry
Q1. Which one of the following is produced during the formation of photochemical smog?
Explanation
Photochemical smog is a type of air pollution that occurs when sunlight reacts with pollutants like nitrogen oxides and volatile organic compounds (VOCs), including hydrocarbons. The reaction leads to the formation of ozone, which is a key component of photochemical smog. Key Components of Photochemical Smog are:
Nitrogen Oxides - Released from vehicles, industrial emissions, and power plants. They react with sunlight to form ozone. Hydrocarbons: Organic compounds that also contribute to ozone formation when exposed to sunlight. Ozone: The primary harmful product of photochemical smog, which can cause respiratory problems and damage to vegetation. Methane is a potent greenhouse gas, but it does not directly form photochemical smog. While it can contribute indirectly to smog formation by reacting with other pollutants, it is not a primary component like ozone, hydrocarbons, or nitrogen oxides.
Answer key for these questions
Q
UPSC year
Correct answer
1
2003
(c) Ozone
Frequently asked questions
How many previous year UPSC questions are there on Chemistry: Environmental Chemistry?
This page covers 1 previous year UPSC Prelims GS Paper-I questions on Chemistry: Environmental Chemistry (Science and Technology), asked from 1996 to 2010. Each has the correct answer and an explanation.
How should I use previous year UPSC questions for Prelims?
Attempt each question first, then open the answer and read the explanation for every option. Repeat by chapter, and track which statements UPSC reuses across years. Previous year questions show the exam pattern and difficulty level.
Which years are covered for Chemistry: Environmental Chemistry?
Questions on Chemistry: Environmental Chemistry (Science and Technology) are available for 5 years, from 1996 to 2010. Use the Year filter to practise a single paper.
