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Properties of Oxygen

Gases: ammoni...

Question

Gases: ammonia, chlorine, hydrogen chloride and sulphur dioxide
Select the gas that matches the description given.

Statement : The gas turns moist red litmus paper blue.

A

Chlorine

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B

Ammonia

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C

Sulphur dioxide

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D

Hydrogen chloride

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Solution

The correct option is B Ammonia
Ammonia is basic in nature which turns red litmus paper to blue and confirms that ammonia is alkaline gas.

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Q. A student prepared hydrogen chloride gas by treating sodium chloride with concentrated sulphuric acid in a test-tube. He held a strip of dry blue litmus paper in HCl gas coming out of the test-tube. The student observed that on coming in contact with HCl gas, the colour of blue litmus paper :
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