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प्रश्न
Write ‘true’ or ‘false for the following;
The major component of air is oxygen.
विकल्प
True
False
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उत्तर
False
Correct Statement: The major component of air is nitrogen.
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संबंधित प्रश्न
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
Sulphur dioxide gas dissolves in water to form ___________ acid.
Statement given below is incorrect. Write the correct statement :
Potassium nitrate on strong heating decomposes into potassium nitrite and nitrogen gas.
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.
Name the following:
An inert gas which has a low boiling point and is used for producing very low temperatures
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%.
Mention one necessary condition for the combustion to take place.
Arrange the following statements in correct sequence
- Plants manufacture food by a process called photosynthesis.
- Plants require energy for their growth.
- Plants take in oxygen and release carbon dioxide just as animals.
- Plants take carbon dioxide from the atmosphere, use chlorophyll in the presence of sunlight and prepare food.
- Such oxygen is available to animals and human beings for breathing.
- During this process, oxygen is released by plants.
Why do traffic assistants wear a mask on duty?
Explain carbon dioxide and its uses.
Metals like magnesium, iron, and sodium burn in oxygen and give basic ______.
