Question

The gases which absorb most of IR (infrared) rays are

• A. SO${}_2$, CO${}_2$, and NO${}_2$
• B. SO${}_2$, CH${}_4$, and O${}_3$
• C. CO${}_2$, CH${}_4$, and CFCs
• D. NO${}_2$, CO${}_2$, and O${}_3$

Answer 1

The correct option is C CO${}_2$, CH${}_4$, and CFCs

• Solar energy is absorbed by earth, which is later emitted as heat energy or infrared (IR) radiation.
• These IR rays are absorbed by greenhouse gases like carbon dioxide (CO${}_2$), methane (CH${}_4$), chlorofluorocarbons (CFCs), nitrous oxide (N${}_2$O), which emit the IR rays in all directions.
  

Hence, the correct answer is CO${}_2$, CH${}_4$ and CFCs.