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प्रश्न
_______ and ______ are the two gases, which when taken together, make up about 99 percentage of air.
- Nitrogen
- carbon-di-oxide
- Noble gases
- Oxygen
विकल्प
I and II
I and III
II and IV
I and IV
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उत्तर
I and IV are the two gases, which when taken together, make up about 99 percentage of air.
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संबंधित प्रश्न
Answer the question put against the following constituents of air :
Oxygen : What is the percentage proportion of oxygen in air ? Why is oxygen called active air.
What happens when Carbon burns in oxygen ? Also give the balanced chemical equation for the reaction.
Fill in the blank
Green plants need ________________to prepare food.
Name the following:
A process which removes carbon dioxide from the air.
What is the percentage of oxygen in air?
Carbon dioxide with water changes
______ present in the air is needed for respiration.
______ gas cylinders are used for breathing purpose for a diver going deep into the sea.
A ______ gas that is used to remove carbon impurities from the steel.
Carbon dioxide gas is ______ in nature.
