Q. Which one of the following statement is not true with regard to transition elements?
A) They readily form complex compounds.
B) They show variable oxidation states.
C) All their ions are colourless.
D) Their ions contain partially filled $d$-electrons.
Explanation
(c)
Most of the transition metal ions due to presence of unpaired $d$-electrons are coloured.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.