D And F Block Elements — Chemistry

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Question 1
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Which of the following is a lanthanoid?

A. Ce
B. Th
C. U
D. Pu
Question 2
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The most common oxidation state of lanthanoidslanthanoids is:

A. +3+3
B. +2+2
C. +4+4
D. +1+1
Question 3
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The colour of K2Cr2O7solutionK2Cr2O7 solution is:

A. Orange
B. Yellow
C. Green
D. Purple

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