The reaction that does NOT define calcination is :

  • Option 1)

    ZnCO_{3}\overset{\Delta }{\rightarrow}ZnO+CO_{2}

     

  • Option 2)

    2Cu_{2}S+3 O_{2}\overset{\Delta }{\rightarrow}2Cu_{2}O+2SO_{2}

  • Option 3)

    Fe_{2}O_{3}\cdot XH_{2}O\overset{\Delta }{\rightarrow}Fe_{2}O_{3}+XH_{2}O

  • Option 4)

    CaCO_{3}\cdot MgCO_{3}\overset{\Delta }{\rightarrow}CaO+MgO+2CO_{2}

Answers (1)
A admin

 

Calcination -

It involves heating of the ore below its fusion temperature in absence of air.

- wherein

Fe2O3 \cdot xH2\rightarrow Fe2O+ xH2O

ZnCO3\rightarrow ZnO + CO2

Cu_{2}S+O_{2}\rightarrow Cu_{2}O+2SO_{2} is roasting process.

 


Option 1)

ZnCO_{3}\overset{\Delta }{\rightarrow}ZnO+CO_{2}

 

Option 2)

2Cu_{2}S+3 O_{2}\overset{\Delta }{\rightarrow}2Cu_{2}O+2SO_{2}

Option 3)

Fe_{2}O_{3}\cdot XH_{2}O\overset{\Delta }{\rightarrow}Fe_{2}O_{3}+XH_{2}O

Option 4)

CaCO_{3}\cdot MgCO_{3}\overset{\Delta }{\rightarrow}CaO+MgO+2CO_{2}

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