A) it is involved in photosynthesis
B) it emits light
C) it traps infrared radiations
D) it traps ultraviolet radiations
Correct Answer: C
Solution :
: The gases which are transparent to solar radiations of short wavelength but retain and partially reflect back long wave heat radiatiorta (IR) are called greenhouse gases (radiatively active gases). They prevent a substantial part of long wave radiations emitted by earth to escape into space. This phenomenon is called greenhouse effect. Various greenhouse gases are \[C{{O}_{2}}\] (60% \[C{{H}_{4}}\] (20%), \[CFCs\](14%), \[{{N}_{2}}O\] (6%), \[{{H}_{2}}O\] and ozone Recently, the concentration of greenhouse gase is increasing leading to increased greenhoua effect thereby causing increase in mean glow temperature (global warming).
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