Which of the following has lowest percentage of carbon
Cast iron
Wrought iron
Steel
All have same percentage
Which of the following elements is alloyed with copper to form brass
Passing $H_2S$ gas into a mixture of $Mn^{+2}, Ni^{+2}, Cu^{+2}$ and $Hg^{2+}$ ions in an acidified aqueous solution precipitates
Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere?
Transition metals are often paramagnetic owing to
The oxoanion in which the oxidation state of the central atom is same as its group number in the periodic table is