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NEET UG CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Useful lanthanoid member is:

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Correct option: A

Cerium

Option A (Cerium) is correct because Cerium is widely used in various applications, including as a catalyst and in polishing compounds.

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A substance which is not paramagnetic is: Green vitriol is Which is the correct order of ionic sizes?) At.no.∶Ce=58,Sn=50,Yb=70 and Lu=71) In the first transition series, the differentiating electron enters: Philosopher’s wool on heating with BaO at 1100

^\circ

C produce A compound in which a metal ion

{\mathrm{M}^{x + }}

(Z=25) has a spin only magnetic moment of

\sqrt {24}

BM. The number of unpaired electrons in the compound and the oxidation state of the metal ion are respectively.