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Roasting

Giving exampl...

Question

Giving examples, differentiate between roasting' and calcination'

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Solution

$\begin{matrix} S . N o . & R o a s t i n g & C a l c i n a t i o n 1 & O r e i s h e a t e d i n t h e p r e s e n c e o f e x c e s s o f a i r o r o x y g e n . & O r e i s h e a t e d i n t h e a b s e n c e o r l i m i t e d s u p p l y o f a i r o r O_{2} 2 & T h i s m e t h o d i s e m p l o y e d f o r s u l p h i d e o r e s . & T h i s m e t h o d i s e m p l o y e d f o r c a r b o n a t e o r e s . 3 & S u l p h u r d i o x i d e i s p r o d u c e d a l o n g w i t h m e t a l o x i d e . & C a r b o n d i o x i d e i s p r o d u c e d a l o n g w i t h m e t a l o x i d e 4 & e . g ., Z n S + 3 O_{2} △ - \to 2 Z n O + 2 S O_{2} ↑ & e . g ., Z n C O_{3} △ - \to Z n O + C O_{2} ↑ \end{matrix}$

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