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प्रश्न
The components of air which are harmful to living beings are
पर्याय
nitrogen and carbon dioxide.
dust and water vapour.
dust and smoke.
smoke and water vapour.
उत्तर
dust and smoke.
Explanation:
Dust and smoke are harmful to living beings because if they enter our body, they can cause respiratory problems.
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संबंधित प्रश्न
Fill in the blanks
Plants and animals maintain the balance of carbon ___________and _________ in the air.
You are given a test tube with two outlets and a bottle of lime water. Using same, how would you demonstrate experimentally the presence of carbon dioxide in air.
State the utility of oxygen for respiration in plants
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
Name the following:
The main, rare (inert) gas present in air.
Why is air considered as a mixture?
______ is the percentage of nitrogen in air.
Match the following
| 1. | Oxygen | a. | Carbon dioxide |
| 2. | Azote | b. | Nitrogen |
| 3. | Solvay process | c. | Vital life |
| 4. | Gun powder | d. | No life |
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere
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?
