D And F Block Elements — Chemistry

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Question 1
EasyJEE

Which of the following is a lanthanoid?

A. Ce\mathrm{Ce}
B. Th\mathrm{Th}
C. U\mathrm{U}
D. Pu\mathrm{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 K2Cr2O7\mathrm{K_{2}Cr_{2}O_{7}} solution is:

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

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