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Wastewater Story — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceWastewater Story1 Mark
MCQ
Study the following statements about ozone:
  • A
    It is essential for breathing of living organisms.
  • ✓
    It is used to disinfect water.
  • C
    It absorbs ultraviolet rays
  • D
    Its proportion in air is about $3\%.$
✓

Answer

Correct option: B.
It is used to disinfect water.
It is used to disinfect water.

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