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प्रश्न
State two characteristics of Basic oxides.
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उत्तर
Basic oxide
- Formed when metals are burnt in air
- turn red litmus to blue.
eg. potassium oxide [K2O]
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संबंधित प्रश्न
Why is oxygen collected by downward displacement of water?
Give four uses of oxygen.
Fill in the blank:
Oxygen occupies about ______ of air by volume.
Complete and balance the following equation
S + O2 →
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.
Write ‘True’ or ‘False’ in front of following statement.
Under laboratory conditions, the oxygen gas is insoluble in water.
(a) Starting from hydrogen peroxide how is oxygen gas prepared in laboratory?
(b) What is the function of manganese dioxide?
(c) Write fully balanced equation for the liberation of oxygen from hydrogen peroxide.
(d) Why is the above method preferred to any other method?
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.
Give reason for the following:
Oxidation of sulphur results in a product which turns moist blue litmus red.
