Advertisements
Advertisements
प्रश्न
Explain the following reaction with the balanced equation.
Zinc carbonate is heated strongly in limited supply of air
Advertisements
उत्तर
Zinc carbonate is heated strongly in a limited supply of air to convert it to zinc oxide. This process is called calcination.
\[\ce{\underset{\text{Zinc carbonate}}{ZnCO_{3(s)}} ->[Heat] \underset{\text{Zinc oxide}}{ZnO_{(s)}} + \underset{\text{Carbon dioxide}}{CO_2↑}}\]
APPEARS IN
संबंधित प्रश्न
Which of the following pairs will give displacement reactions?
In the extraction of aluminium: Why is it necessary to replace anodes time to time?
Why does a new aluminium vessel lose shine so soon after use?
How is manganese extracted from manganese dioxide, MnO2? Explain with the help of an equation.
Explain why, an aqueous solution of sodium chloride is not used for the electrolytic extraction of sodium metal.
Name the gas evolved when cinnabar ore is roasted.
Name two metals which are always found in combined state.
The metal which is always present in an amalgam is ______.
A metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence of air.
- Name the metal and write its chemical symbol.
- Write the name and formula of the sulphide ore.
- Give the equations of chemical reactions involved in the production of metal from its sulphide ore.
- Name a common device in which this metal is used.
- Can this metal displace copper from copper sulphate solution? Why?
Which metal can be extracted from the following ore?
bauxite
Give reasons, why aluminum is used in:
In making ships
Give the chemical formula of :
Cryolite
Name the following:
The mixture of materials fed into a furnace to extract a metal.
Name the following:
The substance added to get rid of gangue in the extraction of metal.
What is meant by concentration of ores?
Which one of the following is not true of metal :
Metals are good conductors of electricity.
Name the process used for the enrichment of sulphide ore.
Write the name.
The process of strong heating of carbonate ores in insufficient air–
Observe the following diagram and write answers.
- Name the method.
- Write anode reaction and cathode reaction.
- Why fluorspar and cryolite are added in the mixture?
Explain in brief types of extraction of less reactive metals according to their reactivity.
