A) They show variable oxidation state
B) All the ions are coloured
C) They exhibit diamagnetic and paramagnetic properties
D) They exhibit catalytic properties
Correct Answer: C
Solution :
The colour of transition element is because of the presence of unpaired electrons and all the transition elements have partially filled\[~d-\]subshell. Thus, all the transition elements are coloured. Because of the presence of one unpaired electrons all the transition elements are paramagnetic.
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