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Question

Acalcination−−−−−−→CaO+MgO+2CO2
Find out A :

A
CaCO3
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B
MgCO3
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C
CaCO3.MgCO3
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D
CaSO4.MgCO3
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Solution

The correct option is C CaCO3.MgCO3
The concentrated ore is heated in absence of air to remove water or moisture from a hydrated oxide and CO2 from a carbonate ore at a temperature below their melting point. This process is called Calcination and is generally carried out in a reverberatory furnace.
Reaction:
CaCO3.MgCO3calcination−−−−−CaO+MgO+2CO2

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