The percentage of lanthanides and iron,respectively,in misch metal are
- A$50, 50$
- B$75, 25$
- C$95, 5$
- D$90, 10$
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$1.$ The size of $M^{3+}$ ions in the actinoid series ........... with an increase in atomic number.
$2.$ The common oxidation state of elements in the actinoid series is .......... .
$3.$ The appearance of elements in the actinoid series is like .......... .
$1.$ The size of $M^{3+}$ ions in the actinoid series ........... with an increase in atomic number.
$2.$ The common oxidation state of elements in the actinoid series is .......... .
$3.$ The appearance of elements in the actinoid series is like .......... .
Difficult
View SolutionWhich of the following lanthanoid elements exhibits $+2$ and $+3$ oxidation states?
Medium
View SolutionWhich lanthanoid from the following exhibits $f^{14}$ configuration in the $+3$ oxidation state?
State the consequences of lanthanoid contraction. Explain the formation of coloured ions by lanthanoids.
Difficult
View SolutionIdentify the formula of compound $(B)$ formed in the following reaction:
$(i)$ Lanthanoids $(Ln)$ are burnt in oxygen to form compound $(A)$.
$(ii)$ Compound $(A)$ reacts with $CO_2$ in excess to form compound $(B)$.
$(i)$ Lanthanoids $(Ln)$ are burnt in oxygen to form compound $(A)$.
$(ii)$ Compound $(A)$ reacts with $CO_2$ in excess to form compound $(B)$.
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