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प्रश्न
Whales come up to the water surface to breathe in oxygen.
पर्याय
True
False
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उत्तर
Whales come up to the water surface to breathe in oxygen- True.
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संबंधित प्रश्न
State three uses of water vapour in the air.
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
Solution of carbon dioxide in water is called _________ acid.
State the full form of LPG and CNG? How are the two different in their composition?
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
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
The mesosphere in the atmosphere, contains most of the air, fit for respiration
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Carbon dioxide, water vapour and energy in the form of heat are evolved during respiration.
The Scottish chemist ______ discovered carbon dioxide is present in air.
The main component of air is oxygen.
When air is moving with cool and soothing, it is called a cyclone.
Carbon dioxide gas is ______ in nature.
