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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
What are the causes of air pollution?
Tick (√) the most appropriate answer.
Symbiotic bacteria is not present in the nodules of :
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
Sulphur dioxide gas dissolves in water to form ___________ acid.
Write ‘true’ or ‘false for the following;
Carbon dioxide is given out during photosynthesis
Give word equation for the following conversion:
Nitric oxide to nitrogen dioxide
Nitrogen is _______ than air.
______ present in the air is needed for respiration.
Nitrogen is an essential element present in proteins and nucleic acids which are the building blocks of living things.
The solid form of CO2 is called dry ice which undergoes condensation.
Observe the picture given in figure carefully and answer the following questions.
- What is covering the nose and mouth of the police man?
- Why is he putting a cover on his nose?
- Can you comment on air quality of the place shown in the figure?
