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प्रश्न
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Photosynthesis is a process by which green plants prepare their own food in the presence of sunlight and chlorophyll.
पर्याय
True
False
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उत्तर
True.
संबंधित प्रश्न
Tick (√) the most appropriate answer.
The humans pollute the air by :
Write ‘True’ or ‘False’ in front of following statement.
Enamelling is the process of baking a mixture of silicates on the surface of aluminium at a high temperature.
Write down the composition of three main gases present in air by volume.
State the utility of oxygen for respiration in living organisms
Name the following:
The type of bacteria which directly absorb nitrogen from the air and converted soluble nitrates in the soil.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
The percentage of carbon dioxide in the air is between 0.2 to 0.4%.
Inhaled air contains a large amount of carbon-di-oxide.
Match the following.
| Nitrogen | Respiration in living animals |
| Oxygen | Fertilizer |
| Carbon dioxide | Refrigerator |
| Dry ice | Fire extinguisher |
The Scottish chemist ______ discovered carbon dioxide is present in air.
______ is used as a substitute for compressed air in tyres.
