And ore on treatment with dilute hydrochloric acid produces brisk effervescence. What type of ore is this? Write the steps required to obtain metal from then restore

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Solution

it must be a carbonate ore because the reaction is releasing carbon dioxide.

reaction which takes place, $Z n C O_{3} + 2 H C l ⟶ Z n C l_{2} + H_{2} O + C O_{2}$

let us take an example of calcinating zinc calamine ( $Z n C O_{3}$ )

first of all, it is calcinated with insufficient oxygen-
$Z n C O_{3} h e a t - --- \to Z n O + C O_{2}$

then, the ZnO obtained is reduced using carbon in form of coke.
$Z n O + C ⟶ Z n + C O$

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