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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS
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The number of element from the following that do not belong to lanthanoids is :
Eu, Cm, Er, Tb, Yb and Lu
Eu, Cm, Er, Tb, Yb and Lu
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Correct option: C
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Option C (1) is correct because Cm (Curium) is an actinide, not a lanthanoid, while the others (Eu, Er, Tb, Yb, Lu) are lanthanoids.
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Statement-I: , have same colour (yellow).
Statement-II: Both ions are having same number of unpaired electrons. The most common oxidation state of Lanthanoid
elements is +3. Which of the following is likely to
also form other oxidation state? A mixture of and is called Smallest ionic radii among the following is of
Statement-II: Both ions are having same number of unpaired electrons. The most common oxidation state of Lanthanoid
elements is +3. Which of the following is likely to
also form other oxidation state? A mixture of and is called Smallest ionic radii among the following is of