Question
What is calcination?
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Answer
Calcination is a process in which the ore is heated to a high temperature below the melting point of the metal in the absence of air or limited supply of air in a reverberatory furnace.
It is generally used for carbonate and hydrated oxides to convert them into anhydrous oxides.
It is generally used for carbonate and hydrated oxides to convert them into anhydrous oxides.
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What is the change in order and entropy in the following :
(i) Dissolution of solid $I _2$ in water.
(ii) Dissociation of $H _{2( g )}$ into atoms ?
→(i) Dissolution of solid $I _2$ in water.
(ii) Dissociation of $H _{2( g )}$ into atoms ?
Calculate the work done by the following chemical reaction:
$
2 NH _4 NO _{3( s )} \xrightarrow{373 K } 2 N _2 O _{( g )}+4 H _2 O _{( g )}
$
State whether the work is done on the system or by the system.
→$
2 NH _4 NO _{3( s )} \xrightarrow{373 K } 2 N _2 O _{( g )}+4 H _2 O _{( g )}
$
State whether the work is done on the system or by the system.
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$\begin{aligned}
& KI + KMnO _4+ H _2 SO _4 \rightarrow K _2 SO _4+ MnSO _4+8 H _2 O + I _2 \\
& H _2 S + KMnO _4+ H _2 SO _4 \rightarrow K _2 SO _4+ MnSO _4+ H _2 O + S .
\end{aligned}$
→$\begin{aligned}
& KI + KMnO _4+ H _2 SO _4 \rightarrow K _2 SO _4+ MnSO _4+8 H _2 O + I _2 \\
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