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प्रश्न
Tick (√) the most appropriate answer.
The humans pollute the air by :
विकल्प
burning a vast amount of coal
burning waste materials
using petrol and diesel vehicles
all the above
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उत्तर
all the above
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संबंधित प्रश्न
A fuel when used releases least amount of pollutants in the air.
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
Sulphur dioxide gas dissolves in water to form ___________ acid.
Complete the statement given below by filling in the blank with the correct word from the words given:
The component of air which is variable in air above sea level and in air in general ______.
Name the following:
The active component of air which supports combustion and is used up in burning
What is the source of oxygen gas in air?
Why is carbon-dioxide gas used to extinguish fire?
Classify the following.
( Dog, Cat, coconut tree, monkey, brinjal plant, papaya plant)
| Things which give out oxygen | Things which give out carbon dioxide |
Air is made up of oxygen only.
Write about the reaction of nitrogen with non metals.
______ is used as a substitute for compressed air in tyres.
