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प्रश्न
How is nitric acid prepared in laboratory?
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उत्तर
In laboratory, nitric acid is prepared by heating a mixture of concentrated sulphuric acid and potassium or sodium nitrate with Conc. H2SO4 at 200°C.
\[\ce{KNO3 + H2SO4 -> KHSO4 + HNO3}\]
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संबंधित प्रश्न
Give two chemical equations for the following:
Reactions of nitric acid with non-metals.
Give the chemical name and formula of the substance formed as a brown ring in the test for nitrate radical.
Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test?
Give reason for the following:
Aluminum does not react with nitric acid of any concentration.
Give reason for the following:
Conc. Nitric acid renders iron passive.
Give reason for the following:
Lighting is a blessing in disguise.
Give two chemical tests for nitric acid.
Write balanced equation and name the product formed when :
Zinc reacts with dilute nitric acid.
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.
X, Y and Z are three crystalline solids that 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 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. - 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 ______. - The action of heat on Y produces a reddish-brown gas and yellow residue which fuses with a glass of the test tube.
INFERENCE 3: The metal ion present in Y is the ______ ion. - 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. - 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)
- The action of heat on Y.
- Concentrated nitric acid is added to copper turnings kept in a beaker.
