Among the lanthanides, the one obtained by synthetic method is
A.
$$Lu$$
B.
$$Pm$$
C.
$$Pr $$
D.
$$Gd$$
Answer :
$$Pm$$
Solution :
Promethium $$(Pm)$$ is the element which is prepared only by synthetic methods. It is not present in nature. It is the only synthetic radioactive lanthanoid.
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