9.2 Nitric Acid Chemistry - 9.2 Nitric Acid

When treated with nitric acid which of the following liberate hydrogen?

Concentrated nitric acid oxidises phosphorus to :

Nitric acid on standing develops brownish colour which may be attributed to the presence of

Explain the following :
An all glass apparatus is used in the laboratory preparation of nitric acid.

Explain the following:
Dilute nitric acid is generally considered a typical acid but not so in its reaction with metals.

Account for the yellow colour that appears in concentrated nitric acid when it is left standing in an ordinary glass bottle.

Dilute nitric acid is generally considered to be a typical acid except for its reaction with metals. In what way is dilute nitric acid different from other acids when it reacts with metals?

Explain the following :
Concentrated nitric acid appears yellow when it is left standing in a glass bottle.

The figure given below illustrates the apparatus used in the laboratory preparation of nitric acid:

(i) Name A (a liquid), B( a Solid) and C(a liquid).
(ii) write the balanced chemical equation to show how nitric acid undergoes decomposition.
(iii) Write the balanced chemical equation for the reaction in which copper is oxidized by concentrated nitric acid.

During a thunderstorm, the rainwater contains nitric acid. The nitric acid is formed as a result of three chemical reactions. Describe or write balanced chemical equation for these three reactions.

Name the product, catalyst and approximate temperature maintained in Ostwalds process. How is the temperature maintained in the Ostwalds process?

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

Write a balanced equation for following :
Laboratory preparation nitric acid.

Write a balanced equation for following :
Reaction of ammonia with nitric acid

Write a balanced equation for following :
Action of conc. Nitric acid on sulphur

Write a balanced equation for following :
Action of cold and dilute nitric acid on copper

Hot, concentrated nitric add reacts with sulphur to form ______.

Cold, dilute nitric acid reacts with copper to give ______.

Sulphur can be converted to sulphuric acid using __________ nitric acid. (Concentrated, dilute)

Ammonal is a mixture of ________ and __________

Copy and complete the following table relating to important industrial processes output refers to the product of the process not the intermediate steps.

Name of process	Inputs	Catalyst	Equation for catalysed reaction	Output
Haber process	Hydrogen        +
	Ammonia + Air			Nitric acid

Give two chemical tests to distinguish between dilute nitric acid and hydrochloric acid.

Describe the Ostwalds process for the manufacture of nitric acid with labeled diagram.