The liquefied metal which expands on solidification is

If a titanium compound exhibits a magnetic moment of $1.73 \, B.M.$,what is the oxidation state of $Ti$ in the compound?

Cuprous ion $(Cu^+)$ is colourless while cupric ion $(Cu^{2+})$ is coloured because

Highest density is of $...$.

Which transition series includes elements $Co$ and $Mo$ respectively?

The spin-only magnetic moment value of the compound with the strongest oxidizing ability among $MnF_{4}$,$MnF_{3}$,and $MnF_{2}$ is $............$ $B.M.$ [nearest integer]