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Pollution of Air and Water — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8SciencePollution of Air and Water1 Mark
MCQ
Which of the following statements is incorrect?
  • A
    Suspended particulate matter can lead to respiratory problems like bronchitis and asthma.
  • B
    Acid rain is mainly constituted by $SO_2$and $NO_2.$
  • C
    $\text{CNG}$ is called a cleaner fuel as it burns completely.
  • ✓
    Major greenhouse gases are $\text{CFCs}$. and hydrocarbons only.
✓

Answer

Correct option: D.
Major greenhouse gases are $\text{CFCs}$. and hydrocarbons only.
The gases which trap the solar radiations and partially reflect back long wave heat radiations are called greenhouse gases. The various greenhouse gases are $CO_2, CH_4,$ chlorofluorocarbons $\text{(CFCs)},$ nitrous oxide, water vapours, etc.

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