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प्रश्न
Explain why only all-glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.
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उत्तर
The glass apparatus is purposely used because the nitric acid produced reacts with practically every material, including cork and rubber. Glass is the lone exception. Nitric acid in its pure form is unstable when exposed to sunlight.
\[\ce{4HNO3 ->[\Delta][Sun light] 4NO2 + 2H2O + O2}\]
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संबंधित प्रश्न
Give two chemical equations for the following:
Nitric acid showing as acidic character.
Name a metal nitrate which on heating is changed into metal oxide.
Name the Following:
Two coloured nitrates.
Why is freshly prepared ferrous sulphate solution used in the ring test?
What do you observe when?
Scrap zinc is heated with conc. HNO3?
What happen when (Given balanced equation):
Nitric acid is added to washing soda and the resulting gas is passed through a freshly prepared lime water?
What happen when (Given balanced equation):
Limestone reacts with nitric acid?
Complete and balance the following equation :
C + HNO3 → ___________
Account for the yellow colour that appears in concentrated nitric acid when it is left standing in an ordinary glass bottle.
Explain the following :
An all glass apparatus is used in the laboratory preparation of nitric acid.
