Q9 / 116 · NTA Abhyas (NEET) 2020 · Chemistry · General Principles and Processes of Isolation of Metals

The reaction that does not define calcination is

A
$Z n C O_{3} \overset{Δ}{\to} Z n O + C O_{2}$
B
$F e_{2} O_{3} . X H_{2} O \overset{Δ}{\to} F e_{2} O_{3} + X H_{2} O$
C
$C a C O_{3} . M g C O_{3} \overset{Δ}{\to} C a O + M g O + 2 C O_{2}$
Correct answer
D
$2 C u_{2} S + 3 O_{2} \overset{Δ}{\to} 2 C u_{2} O + 2 S O_{2}$

Solution

Calcination is a process in which ore is heated mainly in the absence of air whereas roasting is a process in which ore is heated in the presence of air.

2 C u_{2} S + 3 O_{2} \overset{Δ}{\to} 2 C u_{2} O + 2 S O_{2} (R o a s t i n g)

Hence, the correct answer is option: 'D'.

The reaction that does not define calcination is

Solution

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