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प्रश्न
Give reason for the following:
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitatre should not be heated very strongly, above 200°C
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उत्तर
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitrate should not be heated very strongly, above 200°C because a higher temperature can cause following problems:
1. Nitric acid would decompose to form nitrogen dioxide.
2. Sodium sulphate is formed which may stick to the glass and cannot be removed easily.
3. The glass apparatus may break.
संबंधित प्रश्न
Write a balanced chemical equation for the following:
Action of cold and dilute Nitric acid on Copper
Give two chemical equations for the following:
Reactions of nitric acid with non-metals.
The nitrate salt which does not give a mixture of NO2 and O2 on heating is ______.
Give three equations of the reaction to prove that nitric acid is an acid.
Give reason for the following :
Nitric acid usually does not yield hydrogen from acids.
Give two chemical tests for nitric acid.
What do you observe when?
Scrap zinc is heated with conc. HNO3?
Complete and balance the following equation:
Cu + HNO3 → NO2 + ________+ _________
Name the compounds required for the laboratory preparation of nitric acid.
Explain why nitric acid is kept in a reagent bottle for a long time.
