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प्रश्न
Briefly state the importance of Carbon dioxide.
उत्तर
Carbon-dioxide acts as a food for plants and in the regeneration of oxygen. It also helps in trapping heat radiations on earth.
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संबंधित प्रश्न
Give two examples of modern fuels.
Fill in the blanks
Plants and animals maintain the balance of carbon ___________and _________ in the air.
Write ‘true’ or ‘false for the following;
Carbon dioxide is given out during photosynthesis
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
Compare respiration and combustion-both involving oxygen of the air.
Air is made up of oxygen only.
_______ and ______ are the two gases, which when taken together, make up about 99 percentage of air.
- Nitrogen
- carbon-di-oxide
- Noble gases
- Oxygen
Which of the following is true about oxygen?
Air also contains a small amount of carbon-di-oxide, water vapour, and some other gases like argon,
Metals like magnesium, iron, and sodium burn in oxygen and give basic ______.
