The percentage $(\%)$ of iron in pyrophoric mischmetal is ...........
- A$20$
- B$50$
- C$95$
- D$5$
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Similar Questions
Discuss the trends in oxidation states shown by actinoids.
Easy
View SolutionIn $+2$ oxidation state,which of the following lanthanoids act as reducing agents?
Fill in the blanks:
$1.$ The atomic radii of the elements of the third transition series are .......... to those of the corresponding elements of the second transition series.
$2.$ Samarium melts at .......... $K$.
$3.$ The color of lanthanoid ions is due to the presence of .......... electrons.
$1.$ The atomic radii of the elements of the third transition series are .......... to those of the corresponding elements of the second transition series.
$2.$ Samarium melts at .......... $K$.
$3.$ The color of lanthanoid ions is due to the presence of .......... electrons.
Difficult
View SolutionWhat is the correct order of ionic radii for the $+3$ oxidation state in $Ce, La, Pm,$ and $Yb$?
Medium
View SolutionWhich element from the following is radioactive?
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