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प्रश्न
Fill in the blank
The reddish-brown powder on the surface of iron nails exposed to air and moisture is called _____.
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उत्तर
The reddish-brown powder on the surface of iron nails exposed to air and moisture is called rust.
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संबंधित प्रश्न
What are the causes of air pollution?
Name the main components of air.
Fill in the blank
The supporter of combustion in air is _____.
Give word equation for the following conversion:
Nitrogen of the air to nitric oxide
State four different properties of a compound and a mixture.
Mention one necessary condition for the combustion to take place.
Why does a lump of cotton wool shrink in water?
Which gas is essential for burning?
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?
The components of air which are harmful to living beings are ______.
