Calcination is a process in which the ore is heated strongly in the absence of air to remove volatile impurities. It thermally decomposes the carbonate.
$2 F e_{2} O_{3} . 3 H_{2} O C a l c i n a t i o n - ------ \to A + 3 H_{2} O$
Find out $A$ :

$2 F e O$

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$2 F e_{3} O_{4}$

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$2 F e_{2} O_{3}$

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$F e O . F e C O_{3}$

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Solution

The correct option is C
$2 F e_{2} O_{3}$

Look at the stoichiometric balance from both sides. Doesn't seem to be a redox reaction, does it?

$2 F e_{2} O_{3} .3 H_{2} O C a l c i n a t i o n - ------ \to 2 F e_{2} O_{3} + 3 H_{2} O$

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Similar questions

A C a l c i n a t i o n - ------ \to C a O + M g O + 2 C O_{2}

A l_{2} O_{3} . 2 H_{2} O C a l c i n a t i o n - ------ \to B + 2 H_{2} O

B

2 {Fe}_{2} O_{3} . 3 H_{2} O(s) C a l c i n a t i o n - ------ \to A + 3 H_{2} O(l)

A

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