A compound A is used in paints instead of sal | vedclass

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(C) Zinc oxide $(ZnO)$ is used in paints as a white pigment. $B$ is zinc hydroxide,$Zn(OH)_2$,which is a white,water-insoluble compound. When $Zn(OH)_

Vedclass · Accepted Answer

$D - Zn, C - Na_2ZnO_2$

Vedclass · Answer

(C) Zinc oxide $(ZnO)$ is used in paints as a white pigment. $B$ is zinc hydroxide,$Zn(OH)_2$,which is a white,water-insoluble compound. When $Zn(OH)_2$ is heated,it decomposes to form zinc oxide $(A)$: $Zn(OH)_2 \xrightarrow{\Delta} ZnO + H_2O$. $Zn(OH)_2$ dissolves in $NaOH$ to form sodium zincate $(C)$: $Zn(OH)_2 + 2NaOH \rightarrow Na_2ZnO_2 + 2H_2O$. When $ZnO$ $(A)$ is heated with coke $(C)$,it produces zinc metal $(D)$ and carbon monoxide $(E)$: $ZnO + C \xrightarrow{\Delta} Zn + CO$. $CO$ burns with a blue flame. Thus,$D$ is $Zn$ and $C$ is $Na_2ZnO_2$.

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