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प्रश्न
Classify Water. Also give a balanced equation to prepare it.
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उत्तर
Water → neutral oxide
2H2 + O2 → 2H2O.
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संबंधित प्रश्न
Answer the question put against the following constituents of air :
Oxygen : What is the percentage proportion of oxygen in air ? Why is oxygen called active air.
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
Dust particles help in the ________ of water vapour in air.
Tick (√) the most appropriate answer.
A gas which dilutes the activity of oxygen in air is:
Fill in the blanks
Plants and animals maintain the balance of carbon ___________and _________ in the air.
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
Name the following:
The main, rare (inert) gas present in air.
Why do we see the sky and air clear and clean after rainfall?
Which gas in the atmosphere is essential for respiration?
The amount of water vapour in the air is more in windy places than in other areas.
What is not true about air?
