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CBSE Class 9 Answered

What is smoke?
Asked by | 18 Aug, 2008, 09:30: PM
Expert Answer

Smoke is the collection of airborne solid and liquid particulates and gases emitted when a material undergoes combustion, together with the quantity of air that is entrained or otherwise mixed into the mass.

It is commonly an unwanted by-product of fires (including stoves, candles, oil lamps, and fireplaces), but may also be used for pest control (cf. fumigation), communication (smoke signals), defense (smoke-screen) or smoking (tobacco, marijuana, etc.) or other inhalation:such as electronic cigarette(ruyan).

Smoke is used in rituals, when incense, sage, or resin are burned to produce a smell for spiritual purposes. Smoke is sometimes used as a flavouring agent and preservative for various foodstuffs. Smoke is also sometimes a component of internal combustion engine exhaust gas, particularly diesel exhaust.

Answered by | 18 Aug, 2008, 09:48: PM
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