Variable valency is a general feature of …..elements.

The colour of $_{62}{\rm{S}}{{\rm{m}}^{3 + }}$ is yellow. The expected colour of ${{\rm{\;}}_{66}}{\rm{D}}{{\rm{y}}^{3 + }}$ is

Steel contains:

Which of the following have highest melting points?

Magnetic moment of $C{r^{2 + }}$ ion is

An element which is highly toxic for plants and animals is:

On strongly heating ${\rm{AgN}}{{\rm{O}}_3}$ we get:

When $ext{V}_2ext{O}_4$ reacts with an acid, the resulting vanadium ion is:

Metallic bonds do not play a role in:

The spin only magnetic moment of ${\rm{M}}{{\rm{n}}^{4 + }}$ ion is nearly

Which is the common oxidation state of the first transition series of elements?