Which of the following reactions are examples of calcination? Options: A . &nbsp CaCO 3 ( s ) → CaO ( s ) + CO 2 ( g ) B . &nbsp 4 FeS 2 ( s ) + 11 O 2 ( g ) → 2 Fe 2 O 3 ( s ) + 8 SO 2 ( g ) C . &nbsp 2 Al ( OH ) 3 ( s ) → Al 2 O 3 ( s ) + 3 H 2 O ( g ) ( ) D . &nbsp CuS ( s ) + CuSO 4 ( aq ) → 2 Cu ( s ) + 2 SO 2 ( g ) ( )

Which of the following reactions are examples of calcination?

Discussion Forum : General Principles And Process Of Isolation Of Elements

Question -

Which of the following reactions are examples of calcination?

Options:

A .

{CaCO}_{3} (s) \to CaO (s) + {CO}_{2} (g)

B .

4 {FeS}_{2} (s) + 11 O_{2} (g) \to 2 {Fe}_{2} O_{3} (s) + 8 {SO}_{2} (g)

C .

2 Al {(OH)}_{3} (s) \to {Al}_{2} O_{3} (s) + 3 H_{2} O (g) ()

D .

CuS (s) + {CuSO}_{4} (aq) \to 2 Cu (s) + 2 {SO}_{2} (g) ()

Answer: Option A
:
A and C

Calcination is a process in which the ore is heated strongly in the absence of air to remove volatile impurities. It involves the thermal decomposition of the ores. This process is mainly used for carbonate and hydroxide ores.
Examples of reaction undergoing calcination among the given are:
${CaCO}_{3} (s) \to CaO (s) + {CO}_{2} (g)$

$2 Al {(OH)}_{3} (s) \to {Al}_{2} O_{3} (s) + 3 H_{2} O (g)$

Was this answer helpful ?

Discussion Forum : General Principles And Process Of Isolation Of Elements

Submit Your Solution hear: