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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
Ammonia is used in the Ostwald process.
What is the ratio of ammonia and air taken in this process?
How will you prepare the following from nitric acid?
copper nitrate
Name the Following:
Gas obtained by treating manganese with 1% nirtric acid.
Why is freshly prepared ferrous sulphate solution used in the ring test?
Give reason for the following:
In laboratory preparation of nitric acid all the apparatus including cork should be made up of glass.
What do you observe when?
Concentrated nitric acid is dropped on a hot surface?
Write balanced equation for the reaction between nitrogen and oxygen, when lightning strikes.
Write the equation for the laboratory preparation of nitric acid from potassium nitrate and concentrated sulphuric acid.
What happens when
NH3 solution is added to CuSO4 solution drop by drop and then in excess.
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.
