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प्रश्न
Write ‘true’ or ‘false for the following;
The composition of air was discovered by Lavoisier.
पर्याय
True
False
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उत्तर
True
APPEARS IN
संबंधित प्रश्न
Answer the question put against the following constituents of air:
Nitrogen : Explain its significance for plants and animals.
Statement given below is incorrect. Write the correct statement :
Potassium nitrate on strong heating decomposes into potassium nitrite and nitrogen gas.
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
Explain why during an incident of fire, one is advised to wrap a woollen blanket over a burning object.
How do the roots of land plants get oxygen for breathing?
Which of the following is true about oxygen?
How will you show that air is dissolved in water?
The component of air used by green plants to make their food, is ______.
______ is necessary for all acids.
On a Sunday morning Paheli’s friend visited her home. She wanted to see some flowering plants in the nearby garden. Both of them went to the garden. While returning from the garden they also observed some flowering plants on the road side. But to their surprise they found that the leaves and flowers of these roadside plants were comparatively very dull. Can you help them to know why?
