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General Principles and processes of Isolation of Elements
medium
ધાતુઓના અલગીકરણમાં, કેલ્સીનેશનથી સામાન્ય રીતે શુ પરિણમે છે ?
A
ધાતુ હાઈડ્રોક્સાઈડ
B
ધાતુ સલ્ફાઇડ
C
ધાતુ ઓકસાઈડ
D
ધાતુ કાર્બોનેટ
(JEE MAIN-2015)
Solution
Calcination is the process of converting an ore into its oxide by heating it strongly below its melting point either in absence or limited supply of air . It is usually done to convert metal carbonated and hydroxides to thier respective oxides.
$\underset{Limestone}{\mathop{CaC{{O}_{3}}}}\,\,\xrightarrow{\Delta }\,\underset{\begin{smallmatrix}
Calcium \\
oxide
\end{smallmatrix}}{\mathop{CaO}}\,\,\,+\,\,C{{O}_{2}}\uparrow $
$\mathop {CuC{O_3}}\limits_{Malachite} \,.Cu{(OH)_2}\xrightarrow{\Delta }\,2CuO + \,\,{H_2}O\, \uparrow \,\, + \,C{O_2} \uparrow $
Standard 12
Chemistry
