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प्रश्न
Write a balanced equation for following :
Laboratory preparation nitric acid.
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उत्तर
\[\ce{KNO3 + H2SO4 ->[>200°C] KHSO4 + HNO3}\]
OR
\[\ce{NaNO3 + H2SO4 ->[<200°C] NaHSO4 + HNO3}\]
APPEARS IN
संबंधित प्रश्न
Name a metal nitrate which on heating is changed into metal oxide.
Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.
Explain with the help of a balanced equation the brown ring test for nitric acid.
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.
- Identify X, Y and Z.
- Write the equation for the action of heat on X.
- Write the equation between solution X and gas Z.
What is meant by the following term?
Fuming nitric acid
Explain with the help of a balanced equation, the brown ring test for nitric acid.
Give reason for the following:
Aluminum does not react with nitric acid of any concentration.
Write the equation for the reaction of dilute nitric acid with copper.
Account for the yellow colour that appears in concentrated nitric acid when it is left standing in an ordinary glass bottle.
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.
