Chloride of which of the following elements will be coloured

The number of unpaired electrons is maximum in (Atomic no. : $ Ti = 22; V= 23; Cr = 24; Fe = 26$)

Which of the following statements is not true in regard to transition elements

In a reaction the ferrous $(F{e^{ + 2 }})$ iron is oxidised to ferric $(F{e^{ + 3 }})$ ion. The equivalent weight of the ion in the above reaction is equal to

Most transition metals

$I :$ form sets of compounds which display different oxidation states of the metal

$II :$ form coloured ions in solution

$III :$ burn vigorously in oxygen

$IV :$ act as catalyst

Which occludes hydrogen