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An Intiative by Sri Chaitanya
a
In lanthanides from Ce+3 to Lu+3 there is a regular decrease in size
b
Ce+4 is a powerful oxidizing agent
c
Magnetic moment increases from Ce(4f15d16s2) to Pr(4f36s2) in their +3 oxidation state
d
Misch metal is a pure lanthanide metal
answer is A.
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