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प्रश्न
Statement given below is incorrect. Write the correct statement :
The percentage of oxygen in air by volume, varies from 21% to 22%.
उत्तर
The percentage of oxygen in air by volume, varies from 20.8% to 20.9%.
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संबंधित प्रश्न
Fill in the blank :
____________ discovered the oxygen gas.
Fill in the blank:
Oxygen is ___________ to litmus testing.
Give balanced equation to obtain oxygen from Silver oxide.
How will you identify oxygen in the laboratory ?
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
Potassium nitrate crystals on heating strongly yield potassium nitrite and ________ gas.
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
The nitric oxide gas reacts with the oxygen and water vapour to form ______ vapour.
Statement given below is incorrect. Write the correct statement :
Calcium burns in oxygen with a golden-yellow flame.
Statement given below is incorrect. Write the correct statement :
The oxygen gas turns moist blue litmus red.
Describe what you will observe and write fully balanced equation when the following is introduced in a jar of oxygen.
Burning magnesium
Give reasons for the following:
patients suffering from lung problems are kept in an oxygen tent.
