Advertisements
Advertisements
प्रश्न
Name three different appliances where air is utilized.
Advertisements
उत्तर
- Vehicles – Run on tyres which are inflated with air.
- Brake mechanisms – Of trains and other machines, work on compressed air.
- Pumps and siphons – Work on air pressure
संबंधित प्रश्न
“Air is a mixture”. Support this statement citing at least three evidences.
What are the two ways in which nitrogen fixation occurs?
Describe a simple experiment to show that l/5th of air is oxygen.
Statement given below is incorrect. Write the correct statement :
Carbon dioxide gas allows the earth to radiate out heat rapidly.
Name the following:
A process which removes carbon dioxide from the air.
Aerated water contains
The main component of air is oxygen.
Explain carbon dioxide and its uses.
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?
State whether the following statement is true or false. If false, correct them.
Plants consume oxygen for respiration.
