Chemistry
The diagram given below is a representation of the Industrial preparation of Nitric acid by Ostwald's process. With respect to the process, answer the following questions :
(a) Write the temperature and the catalyst required during the catalytic oxidation of ammonia.
(b) Give balanced chemical equation for the reaction occurring during the conversion of nitrogen dioxide to nitric acid.
Nitric Acid
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Answer
(a) In the catalytic oxidation of ammonia by Ostwald's process, the temperature should be 800° C and catalyst used is platinum.
(b) 4NO2 + 2H2O + O2 ⟶ 4HNO3
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Related Questions
Give balanced equation for the following :
(a) dilute nitric acid and copper carbonate.
(b) oxidation of carbon with conc. HNO3.
(c) Laboratory preparation of nitric acid.
(d) Action of heat on a mixture of copper and concentrated nitric acid.
X, Y and Z are three crystalline solids which are soluble in water and have a common anion.
To help you to identify X, Y and Z, you are provided with the following experimental observations. Copy and complete the corresponding inferences in (a) to (e).(a) A reddish-brown gas is obtained when X, Y and Z are separately warmed with concentrated sulphuric acid and copper turning added to the mixture.
INFERENCE 1: The common anion is the …………… ion.
(b) When X is heated, it melts and gives off only one gas which re-lights a glowing splint.
INFERENCE 2: The cation in X is either …………… or ……………
(c) The action of heat on Y produces a reddish-brown gas and a yellow residue which fuses with the glass of the test tube.
INFERENCE 3: The metal ion present in Y is the …………… ion.
(d) When Z is heated, it leaves no residue. Warming Z with sodium hydroxide solution liberates a gas which turns moist red litmus paper blue.
INFERENCE 4: Z contains the …………… cation.
(e) Write the equations for the following reactions.
- X and concentrated sulphuric acid (below 200° C). (One equation only for either of the cations given in INFERENCE 2).
- Action of heat on Y.
- Concentrated nitric acid is added to copper turnings kept in a beaker.
(a) Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.
(b) Explain with the help of a balanced equation, the brown ring test for nitric acid.
(c) Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test
The action of heat on the blue crystalline solid X, gives a reddish brown gas Y, a gas which re-lights a glowing splint and leaves a black residue. When gas Z, which has a rotten egg smell, is passed through a solution of X, a black ppt. is formed.
(a) Identify X, Y and Z.
(b) Write equation for action of heat on X.
(c) Write equation between solution of X and gas Z.