What is the number of electrons present in 3d orbital of Ti in +2 state?

Identify molecular formula of laevulose

Which of the following pair of compounds does not demonstrate the law of multiple proportion?

What is the coordination number of central metal ion in $\left[\mathrm{Fe}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$ ?