By annealing, steel
Becomes soft
Becomes liquid
Becomes hard and brittle
Is covered with a thin film of $F{e_3}{O_4}$
All $Zn( +II)$ compounds are white because
Invar, an alloy of $ Fe$ and $ Ni $ is used in watches and meter scale, its characteristic property is
The "spin-only" magnetic moment [ in units of Bohrmagneton, $(\mu _B )$ ] of $Ni^{2+}$ in aqueous solution would be (At. No. $Ni= 28)$
Cigarette or gas lighter is made up of
The alloy of steel that is used in making automobile parts and utensils