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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
उत्तर
all the above
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संबंधित प्रश्न
Statement given below is incorrect. Write the correct statement :
During thunder and lightning, nitrogen and oxygen combine to form nitrogen dioxide gas.
Write ‘True’ or ‘False’ in front of following statement.
The trapping of solar heat energy in the earth’s atmosphere is called greenhouse effect.
What do you observe when Ice cold water is filled in a glass tumbler.
The diagrams below represents an experiment to show the presence of a component of air.
- State why air is sucked from – outlet ‘B’ and not from outlet “A”
- State why the air is sucked ‘slowly’ from the outlet “B”
- State the observation seen after completion of the experiment.
- State the reason for the above observation seen.
- Name another component which if present in air as a pollutant would have given a similar observation
Why is carbon-dioxide gas used to extinguish fire?
The constituent of air that supports combustion is _____.
The component of air used by green plants to make their food, is ______.
All living things use oxygen for breathing.
Explain carbon dioxide and its uses.
Nitrogen gas is so cold that moisture in the air condenses on it, creating a dense fog.
