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
Answer the question put against the following constituents of air:
Nitrogen : Explain its significance for plants and animals.
What is air pollution ? What are the harmful effects of sulphur dioxide, nitrogen dioxide and hydrogen sulphide present in the air ?
Statement given below is incorrect. Write the correct statement :
Potassium nitrate on strong heating decomposes into potassium nitrite and nitrogen gas.
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
Give word equation for the following conversion:
Nitrogen of the air to nitric oxide
Give word equation for the following conversion:
Nitrogen dioxide to nitric acid
Of the total volume of air – 4/5th is nitrogen. State the utility or consequence of this ratio.
What is the percentage of oxygen in air?
The balance of oxygen in atmosphere is maintained through photosynthesis in animals and respiration in plants.
______ exists in nature as silicates, carbonates, oxides, and water. It also exists in a free state as part of the air in the atmosphere.
