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प्रश्न
A fuel when used releases least amount of pollutants in the air.
विकल्प
sulphur dioxide
chlorofluorocarbon
smoke
CNG
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उत्तर
CNG
APPEARS IN
संबंधित प्रश्न
What is air pollution ? What are the harmful effects of sulphur dioxide, nitrogen dioxide and hydrogen sulphide present in the air ?
Complete and balance the following equation
CaO + H2O →
What is the percentage of nitrogen in air?
The component of air used by green plants to make their food, is ______.
Air contains a small amount of CO2, Water vapour, and some other gases like ______, etc.
How to show the presence of carbon-di-oxide in the air?
A ______ gas that is used to remove carbon impurities from the steel.
Write the reaction of carbon dioxide with lime water.
Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.
- Bubbles of air came out from the bottle.
- Some water entered the bottle.
- Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.
- No bubbles formed, only water entered the bottle.
Which observations is/are correct?
Explain the following observations very briefly
Breathing through mouth may harm you.
