Question

Which is not true about White Vitriol?

• A. It can be formed by the reaction of $Zn$ with dilute $H_{2}S{O}_4$
• B. It can be formed by the reaction of $ZnO$ with dilute $H_{2}S{O}_4$
• C. It can be formed by the reaction of $ZnC{O}_3$ with dilute $H_{2}S{O}_4$
• D. When it is heated between $70{}^{\circ }C$ and $280{}^{\circ }C$, anhydrous zinc sulphate is formed

Answer 1

The correct option is D When it is heated between $70{}^{\circ }C$ and $280{}^{\circ }C$, anhydrous zinc sulphate is formed

White Vitriol is zinc sulphate.
a) $Zn+H_{2}S{O}_4\to ZnS{O}_4+H_2$
b) $ZnO+H_{2}S{O}_4\to ZnS{O}_4+H_{2}O$
c) $ZnC{O}_3+H_{2}S{O}_4\to ZnS{O}_4+C{O}_2+H_{2}O$
d) When it is heated above $70{}^{\circ }C$ but below ${280}^{\circ }C$, it forms a monohydrate. We get anhydrous zinc sulphate when it is heated above $280{}^{\circ }C$.