Which of the following does not contain copper
Brass
Bronze
Azurite
Calamine
Out of $\mathrm{Cu}_{2} \mathrm{Cl}_{2}$ and $\mathrm{CuCl}_{2}$, which is more stable and why ?
Paramagnetism is not exhibited by
The ionisation energies of transition elements are
Which of the following is used as white pigment
The correct formula of permanganic acid is