Advertisements
Advertisements
Question
Account for the yellow colour that appears in concentrated nitric acid when it is left standing in an ordinary glass bottle.
Advertisements
Solution
In a glass apparatus nitric acid gets decomposed by sunlight. Yellowish brown colour of nitric acid is due to the presence of nitrogen dioxide formed due to thermal decomposition of nitric acid.
APPEARS IN
RELATED QUESTIONS
Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test?
How is nitric acid prepared in laboratory?
Write the equations involved in Ostwald process.
Nitric acid cannot be concentrated beyond 68% by the distillation of a dilute solution of HNO3, State the reason.
Give two chemical tests to distinguish between dilute nitric acid and hydrochloric acid.
Choose the correct answer from the option given below :
Nitric acid on standing develops brownish colour which may be attributed to the presence of :
Describe what you see when concentrated nitric acid is added to copper.
Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.
Write the equation for the reaction of dilute nitric acid with copper.
A dilute acid B does not normally give hydrogen when reacted with metals but does give a gas when it reacts with copper. Identify B. Write the equation with copper.
