` In the laboratory method answer the following questions 1.What is the ratio of potassium nitrate and sulphuric acid? 2.Give the reaction which takes place in the above retort. 3.Why product obtained is yellow in colour? 4.How can this yellow colour can be removed. 5.Why the temperature is maintained below 200 degree Celsius? 6.Why all glass apparatus is used? 7.What do you know about the nature of reaction?
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1. Equal amount of hno3 and h2so4 is used
3.Due to decomposition of the acid it is yellow in colour pure nitric acid is yellow in colour
4.Bubling of air or carbon dioxide,or dilution with water
5.because above 200.cit form sulphate which forms hard crust on the apparaturs and difficult to remove
6.Becuase nitric acid vapour are corrosive to plastic and cork
7.Nature of the reaction corossive
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