Question : Which among the following is added to commercial nitric acid to make it coloured?
Option 1: Carbon dioxide
Option 2: Sulphur dioxide
Option 3: Coloured impurities
Option 4: Nitrogen dioxide
Correct Answer: Nitrogen dioxide
Solution : The correct option is Nitrogen dioxide .
Nitrogen dioxide (NO 2 ) is used to give nitric acid a brownish colour in commercial manufacture. Because of the presence of dissolved nitrogen dioxide gas in the solution, this is a distinguishing feature of fuming or concentrated nitric acid.
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Question : Which among the following gases is also known as ‘Laughing Gas’?
Question : Acid rain is caused due to pollution of the atmosphere by:
Question : Which among the following is used in fire extinguishers?
I. carbon dioxide
II. oxygen
III. sulphur dioxide
Question : Which among the following is a greenhouse gas?
I. Methane
II. Carbon dioxide
III. Nitrogen dioxide
Question : The acid used in lead storage cells is:
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