Which of the following reactions occur during calcination?

C a C O_{3} \to C a O + C O_{2}

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Z n S + \frac{3}{2} O_{2} \to Z n O + S O_{2}

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A l_{2} O_{3} . x H_{2} O \to A l_{2} O_{3} + x H_{2} O

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2 F e S_{2} + \frac{11}{2} O_{2} \to F e_{2} O_{3} + 4 S O_{2}

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Solution

The correct options are
A $C a C O_{3} \to C a O + C O_{2}$
C $A l_{2} O_{3} . x H_{2} O \to A l_{2} O_{3} + x H_{2} O$
Calcination is the process of converting carbonates or hydroxides to their oxides by heating it strongly. The ore is heated in the absence of air or in a limited supply of air. So correct option is (a) and (c).

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Similar questions

Z n + 1 / 2 O_{2} \to Z n O + 35.25 k J . H g O \to H g + 1 / 2 O_{2} + 9.11 k J .

Z n + H g O \to Z n O + H g

Given that,

$Z n + \frac{1}{2} O_{2} \to Z n O + 35.25 K J$

$H g O \to H g + \frac{1}{2} O_{2} - 9.11 K J$

The heat of the reaction $Z n + H g O \to Z n O + H g$ is

C a C O_{3} \to C a O + C O_{2}

4 F e S_{2} + 11 O_{2} \to 2 F e_{2} O_{3} + 8 S O_{2}

2 A l (O H)_{3} \to A l_{2} O_{3} + 3 H_{2} O

C u_{2} S + 2 C u O \to 4 C u + S O_{2}

C a O

M g O

C O_{2}

S O_{3}

N a_{2} O

Z n O

A l_{2} O_{3}

F e_{2} O_{3}

Zn is the oxidant in the following reaction

$Z n (s) + \frac{1}{2} O_{2} ⟶ Z n O (s)$

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