Which one of the following elements shows maximum number of different oxidation states in its compounds ?
A.
$$Eu$$
B.
$$La$$
C.
$$Gd$$
D.
$$Am$$
Answer :
$$Am$$
Solution :
We know that lanthanides $$La,Gd$$ shows $$+3,$$ oxidation state, while $$Eu$$ shows oxidation state of $$+2$$ and $$+ 3.$$ Am shows $$+3,$$ $$+4, +5$$ and $$+6$$ oxidation states. Therefore Americium $$(Am)$$ has maximum number of oxidation states.
Releted MCQ Question on Inorganic Chemistry >> D and F Block Elements
Releted Question 1
When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volume of hydrogen evolved is