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प्रश्न
What is the composition of air?
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उत्तर
Air is a mixture of 79% nitrogen, 20% oxygen, 1% carbon dioxide, water vapours, and some other gases. Air also contains dust particles.
संबंधित प्रश्न
Classify Calcium oxide. Also give a balanced equation to prepare it.
Complete and balance the following equation
CaO + H2O →
Fill in the blank
The supporter of combustion in air is _____.
Write the percentage of the gases present in air.
Write a note on nitrogen.
The amount of water vapour in the air is more in windy places than in other areas.
Metals like magnesium, iron, and sodium burn in oxygen and give basic ______.
Nitrogen gas is so cold that moisture in the air condenses on it, creating a dense fog.
Assertion: Carbon dioxide occurs as carbonates in nature.
Reason: Carbon dioxide can exist as a liquid at atmospheric pressure.
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?
