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Q.

Which one of the following is not an example of calcination?

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a

CaCO3⋅MgCO3→△CaO+MgO+2CO2

b

Fe2O3⋅H2O→∆Fe2O3+xH2O

c

CaCO3→∆CaO+CO2

d

2PbS+3O2→∆2PbO+2SO2

answer is D.

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Detailed Solution

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2PbS + 3O2 → 2Pb0 + 2SO2
The above reaction is not calcination. It is an example of roasting

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Which one of the following is not an example of calcination?