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प्रश्न
Give reasons.
Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
Give a reason for the following:
Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals.
उत्तर १
Carbonate and sulphide ores are usually converted into oxides during the process of extraction because metals can be easily extracted from their oxides rather than from their carbonates and sulphides.
उत्तर २
It is easier to extract metals from their oxide ores by reduction process than from their carbonate and sulphide ores. Hence, carbonate and sulphide ores are usually converted into oxides during the metals extraction process.
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संबंधित प्रश्न
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.
Name one metal which is extracted by reduction with carbon.
Fill in the following blank with suitable word:
The non-metal present in steel is ............
Fill in the following blank with suitable word:
The rocky material found with ores is called.............
Define the term ore.
Name the chemical compound which is electrolysed in molten state to obtain aluminium metal. Which gas is evolved during this process?
Name the gas evolved when cinnabar ore is roasted.
Name the metal which is extracted from the ore called 'rock salt'.
Give reasons, why aluminum is used in:
In making ships
Aluminum is used in thermite welding:
write reaction for process?
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
What is the function of cryolite used along with alumina as the electrolyte?
Name the following:
Two metals which are found in the free or native state.
What is meant by refining of metals? Name the three common methods used for refining.
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
Write the name.
The process of strong heating of carbonate ores in insufficient air–
Explain concept with example/explain with the help of a balanced equation.
Ionic bond and ionic compounds
The poorest conductor of heat among metals is ____________.
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
