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प्रश्न
Fill in the blank
Green plants need ________________to prepare food.
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उत्तर
Green plants need CO2 water and light to prepare food.
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संबंधित प्रश्न
Classify Carbon dioxide. Also give a balanced equation to prepare it.
Write down the composition of three main gases present in air by volume.
What are fuels?
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
Give word equation for the following conversion:
Nitrogen dioxide to nitric acid
Compare the three main components of air i.e. nitrogen, oxygen and carbon dioxide with reference to their density and solubility, nature and reactivity.
Of the total volume of air – 4/5th is nitrogen. State the utility or consequence of this ratio.
What happens if the percentage of carbon-dioxide increases in the air?
Match the following.
| Nitrogen | Respiration in living animals |
| Oxygen | Fertilizer |
| Carbon dioxide | Refrigerator |
| Dry ice | Fire extinguisher |
When cooled to -57°C, gaseous carbon-di-oxide becomes a liquid.
