During calcination of the ore, __________________.

the lower oxides are oxidised to higher oxides

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the metal is oxidised to the oxide

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the sulphides are converted into sulphates

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the volatile matter is expelled

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Solution

The correct option is D the volatile matter is expelled
Calcination is the process pf heating the ore below its melting point in the absence of air to remove the volatile impurities like arsenic.This method is employed for the carbonate ores.

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Similar questions

Calcination is a process in which ore is heated in the absence of air. As a result of which the ___ ore is converted into its oxide.

Z n S

Give reasons

(a) Platinum, gold and silver are used to make jewellery.

(b) Sodium, potassium and lithium are stored under oil.

(d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction.

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