Rusting of iron is catalyzed by which of the following?
$Fe$
$Zn$
$O_2$
$H^+$
The rusting or iron occurs in acidic medium. Hence it is catalyzed by $H ^{+}$ions.
Froth floatation process is used for the concentration of the ore of
Which does not represent correct method ?
Blister copper
Which of the following does not contain $Mg$ :
Blister copper is refined by stirring molten impure metal with green logs of wood because such a wood liberates hydrocarbon gases (like $CH_4$) . This process $X$ is called . . . . . . . . . and the metal contains impurities of $Y$ is …….. .
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