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Q.

Separation of Lanthanides from their mixture is not easy because of

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a

 Inert pair effect

b

 Consequences of lanthanide contraction

c

Shielding effect

d

 Penetrating effect

answer is C.

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Detailed Solution

Due to lanthanide contraction the size of all lanthanides is close to each other leading to similar chemical properties.Due to this reason it is difficult to separate lanthanides from the mixture.

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Separation of Lanthanides from their mixture is not easy because of