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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.
Write an equation for the following conversions A, B, C and D.
Give the chemical name and formula of the substance formed as a brown ring in the test for nitrate radical.
Why is the temperature maintained at 200°C in the above reaction?
Why is freshly prepared ferrous sulphate solution used in the ring test?
How will you prepare Aqua regia from nitric acid?
Complete and balance the following equation :
SO2 + HNO3 → ______________
Complete and balance the following equation :
Pt + HNO3 + HCl → ___________
Write the equation for the laboratory preparation of nitric acid from potassium nitrate and concentrated sulphuric acid.
From the following list of substances, choose one substance in the case which matches the description given below:
Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate, zinc carbonate.
A Substance that gives off only oxygen when heated.
