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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
Fill in the blank :
________ is the most abundant inert gas present in air.
Statement given below is incorrect. Write the correct statement :
Potassium nitrate on strong heating decomposes into potassium nitrite and nitrogen gas.
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
Name the following:
The main, rare (inert) gas present in air.
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
Give word equation for the following conversion:
Nitrogen of the air to nitric oxide
How will you prove that air supports burning?
Nitrogen gas is so cold that moisture in the air condenses on it, creating a dense fog.
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
Oxygen
