Type metal is an alloy of $Pb, Sb$ and $Sn$. It consists of

The alloy,which contains $95 \%$ aluminium and small amounts of copper,magnesium and manganese is . . . . . .

The smelting of iron in the blast furnace involves all the following processes except:

Refractory materials are generally used in furnaces because

Among statements $(a)-(d),$ the correct ones are
$(a)$ Limestone is decomposed to $CaO$ during the extraction of iron from its oxides.
$(b)$ In the extraction of silver,silver is extracted as an anionic complex.
$(c)$ Nickel is purified by Mond's process.
$(d)$ $Zr$ and $Ti$ are purified by Van Arkel method.

Stainless steel is an alloy of iron with: