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Air Around Us — Science STD 6 — Question

CBSE BoardEnglish MediumSTD 6ScienceAir Around Us1 Mark
MCQ
Why are chimneys provided in factories?
  • A
    So as to locate the factories easily.
  • B
    To take the harmful smoke and gases away from us.
  • ✓
    To absorb the dust particles present in smoke before being released to the atmosphere.
  • D
    All of the above.
✓

Answer

Correct option: C.
To absorb the dust particles present in smoke before being released to the atmosphere.
To absorb the dust particles present in smoke before being released to the atmosphere.

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