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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
Give a balanced chemical equation for Laboratory preparation of Nitric acid.
How will you prepare the following from nitric acid?
copper nitrate
Name a metal nitrate which on heating is changed into metal.
What is meant by the following term?
Decrepitation
Complete and balance the following equation :
HNO3 + FeSO4 + H2SO4 → ______________
State the conditions for the oxidation of ammonia to nitrogen monoxide [nitric oxide], in the manufacture of nitric acid by Ostwald's process. Write the balanced equcation for the reaction.
Name the product, catalyst and approximate temperature maintained in Ostwald's process. How is the temperature maintained in the Ostwald's process?
Name the gas evolved:
The gas produced on heating sodium nitrate.
Why should the temperature of the reaction mixture of nitric acid not be allowed to rise above 200oC?
From the following list of substances, choose one substance in the case which matches the description given below:
Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate, zinc carbonate.
A Substance that gives off only oxygen when heated.
