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प्रश्न
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
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उत्तर
- Because if we suck from ‘A’, lime water will be sucked out.
- Because if the air is sucked fast, lime water will also be sucked out.
- Lime water turns milky.
- The reason is the formation of CO2.
- Sulphur dioxide
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.
Define the term smog.
Suggest five measures to prevent air pollution.
Tick (√) the most appropriate answer.
A gas which dilutes the activity of oxygen in air is:
Why is carbon-dioxide gas used to extinguish fire?
Air is made up of oxygen only.
______ is the percentage of nitrogen in air.
_______ can be seen moving in a beam of sunlight in a dark room.
The main component of air is oxygen.
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?
