$A$ white solid '$A$' on heating gives off a gas which turns lime water milky. The residue is yellow when hot but turns white on cooling. This solid '$A$' is

  • A
    Zinc sulphate
  • B
    Zinc carbonate
  • C
    Lead sulphate
  • D
    Lead carbonate

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Similar Questions

Describe the importance of the following:
$(i)$ limestone
$(ii)$ cement
$(iii)$ plaster of Paris.

$CaCO_3$ $\xrightarrow[excess \ H_2O]{CO_2 \ in} A$ $\xrightarrow{\Delta} B$
Identify $A$ and $B$.

Thermal decomposition of zinc nitrate gives:

Give the uses of cement.

Which of the following elements does not exhibit variable valency?

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