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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
Explain the following:
An all-glass apparatus is used in the laboratory preparation of nitric acid.
Write a balanced equation and name the products formed when zinc reacts with dilute nitric acid.
How will you prepare the following from nitric acid?
Lead nitrate
Give the chemical name and formula of the substance formed as a brown ring in the test for nitrate radical.
Name the process used for the manufacture of nitric acid.
Describe the Ostwald's process for the manufacture of nitric acid with labeled diagram.
The first step in the manufacture of nitric acid is the catalytic oxidation of ammonia. What is the name of the catalyst?
Write the equation for the reaction:
Aluminum, Nitride and Water.
A dilute acid B does not normally give hydrogen when reacted with metals but does give a gas when it reacts with copper. Identify B. Write the equation with copper.
Complete the table:
| Name of Process | Inputs | Equation | Output |
| Ammonia + Air | Nitric acid |
