Advertisements
Advertisements
प्रश्न
Explain the following:
Concentrated nitric add appears yellow when it is left standing in a glass bottle.
उत्तर
Although pure concentrated nitric acid is colorless, it appears yellow when left standing in a glass bottle due to the dissolution of reddish brown nitrogen dioxide gas in the acid. Nitrogen dioxide is produced because of the thermal decomposition of a portion of nitric acid.
4HNO3 → 2H2O + 4NO2 + O2
APPEARS IN
संबंधित प्रश्न
The nitrate salt which does not give a mixture of \[\ce{NO2}\] and \[\ce{O2}\] on heating is ______.
Name the Following:
Two coloured nitrates.
Give reason for the following:
In laboratory preparation of nitric acid all the apparatus including cork should be made up of glass.
Give reason for the following :
Nitric acid usually does not yield hydrogen from acids.
Give two chemical tests to distinguish between dilute nitric acid and hydrochloric acid.
Choose the correct answer from the option given below :
When treated with nitric acid which of the following liberate hydrogen?
Fill in the blank with appropriate word/words.
98% nitric acid is obtained by distilling 68% nitric acid with ________ under ______
Complete and balance the following equation:
Cu + HNO3 → NO2 + ________+ _________
Name the compounds required for the laboratory preparation of nitric acid.
Account for the yellow colour that appears in concentrated nitric acid when it is left standing in an ordinary glass bottle.
