MHT CET 2020 Chemistry Solved Paper

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Question : 47 of 50

Marks: +1, -0

Which of the following factors may be regarded as the main cause of lanthanoid contraction?

Greater shielding of 5d electrons by 4f electrons
Poorer shielding of 5d electrons by 4f electrons
Effective shielding of one of 4f electrons by another in the subshell
Poor shielding of one of 4f electron by another in the subshell

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