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प्रश्न
Give tests for oxygen gas.
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उत्तर
Tests for oxygen gas are :
- It rekindles glowing wooden splinter.
- If mixed with colourless nitric oxide gas, it forms reddish brown fumes of nitrogen dioxide.
- It dissolves in alkaline pyrogallol solution and turns it brown.
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संबंधित प्रश्न
Why is oxygen collected by downward displacement of water?
Why is hydrogen peroxide preferred in the preparation of oxygen gas ?
Fill in the blank :
Oxygen occupies about _____% of air by volume.
Give balanced equation to obtain oxygen from Silver oxide.
Complete and balance the following equation
S + O2 →
(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?
Give reason for the following:
Oxygen gas does not affect moist blue litmus paper, but carbon dioxide turns it slightly pink.
Give reason for the following:
Oxidation of sulphur results in a product which turns moist blue litmus red.
Mention the physical properties of oxygen.
Write a note on the rusting process.
