Which one of the following is not an example | vedclass

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(D) Calcination is the process of heating an ore in the absence or limited supply of air to remove moisture and volatile impurities.Option $A$ is the

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$2PbS + 3O_2 \xrightarrow{\Delta} 2PbO + 2SO_2$

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(D) Calcination is the process of heating an ore in the absence or limited supply of air to remove moisture and volatile impurities.Option $A$ is the dehydration of limonite (calcination).Option $B$ is the calcination of limestone.Option $C$ is the calcination of dolomite.Option $D$ $(2PbS + 3O_2 \xrightarrow{\Delta} 2PbO + 2SO_2)$ involves the reaction of sulfide ore with oxygen,which is the definition of roasting.

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

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Which of the following reactions is an example of roasting?

Choose the correct code regarding the Roasting process.
$I$. It is the process of heating ore in air to obtain the oxide.
$II$. It is an exothermic process.
$III$. It is used for hydrated oxide and oxysalt ore.
$IV$. It is used after the concentration of ore.

Roasting is done in

The mixture obtained from the roasting of copper pyrites is ......... .

Heating of pyrites in air for oxidation of sulphur is called

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