PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoStudy the following statements about ozone:
a. It is essential for breathing of living organisms.
b. It is used to disinfect water.
c. It absorbs ultraviolet rays.
d. Its proportion in air is about 3%.
Which of these statements are correct?
a. It is essential for breathing of living organisms.
b. It is used to disinfect water.
c. It absorbs ultraviolet rays.
d. Its proportion in air is about 3%.
Which of these statements are correct?
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