Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 General Science Chemistry Basic Concepts of Chemistry

Consider the following features of a particular gas-

1. It is a reddish-brown gas with pungent smell.

2. It indirectly causes acid-rain.

Which of the following gases is being talked about?

1

CFC

2

SO₂

3

NO2

4

SO3

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