Advertisements
Advertisements
प्रश्न
Name the products formed when dilute HNO3 is added to copper.
Advertisements
उत्तर
When diluted nitric acid is applied to copper, copper nitrate, water, and the colourless gas nitrogen monoxide are generated.
\[\ce{3Cu + 8HNO3 {(dil.)} -> \underset{Copper nitrate}{3Cu(NO3)2} + 4H2O + 2NO-}\]
Nitrogen monoxide then combines with air, producing reddish-brown emissions of nitrogen dioxide.
\[\ce{2NO + O2 -> \underset{Nitrogen dioxide}{2NO2}}\]
संबंधित प्रश्न
Write a balanced chemical equation for the following:
Action of cold and dilute Nitric acid on Copper
Write balanced chemical equations for Action of hot and concentrated Nitric acid on copper
Ammonia is used in the Ostwald process.
What is the ratio of ammonia and air taken in this process?
Write balanced equation and name the product formed when :
Sodium hydrogen carbonate is added to nitric acid.
Write balanced equation and name the product formed when :
Cupric oxide reacts with nitric acid.
Give the name of a soluble lead salt and write the eqution for the action of heat on this salt. Write the equation for the preparation of nitric acid from potassium nitrate.
Copy and complete the following table relating to important industrial processes output refers to the product of the process not the intermediate steps.
| Name of process | Inputs | Catalyst | Equation for catalysed reaction | Output |
| Haber process | Hydrogen + | |||
|
Ammonia + |
Nitric acid |
Balanced equation of oxidation of carbon with concentrated HNO3
Explain the following :
An all glass apparatus is used in the laboratory preparation of nitric acid.
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.
