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प्रश्न
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.
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उत्तर
a. X is copper nitrate [Cu(NO3)2].
Y is nitrogen dioxide [NO2].
Z is hydrogen sulphide [H2S].
b. \[\ce{\underset{Blue crystalline}{2Cu(NO3)2} ->[heat] \underset{Black}{2CuO} + 4NO2 + O2}\]
c. When a H2S gas, which has a rotten egg smell, is passed through a solution of Cu(NO3)2, a black ppt. of CuS is formed.
\[\ce{Cu(NO3)2 + H2S ->CuS + 2HNO3}\]
संबंधित प्रश्न
Name the process used for the manufacture of nitric acid.
Give reason for the following:
Conc. Nitric acid renders iron passive.
Give reason for the following:
Concentrated nitric acid is brown in colour.
What do you observe when?
Hydrogen sulphide is bubbled through conc. HNO3?
What happen when (Given balanced equation) :
Nitric acid is dissolved in large amount of water?
What happen when (Given balanced equation):
Nitric acid is added to washing soda and the resulting gas is passed through a freshly prepared lime water?
What happen when (Given balanced equation):
Limestone reacts with nitric acid?
Name (formula is not acceptable) the gas produced in the following reaction:
On warming ammonium sulphate with sodium hydroxide solution.
State, what is observe when nitric acid is kept in a reagent bottle for a long time.
What would you observe in the following case:
Copper is heated with concentrated nitric acid in a hard glass test tube.
