NEET UG CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Carbon in wrought iron is present as

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Correct option: D

Partly iron carbide and partly as graphite

Option D (Partly iron carbide and partly as graphite) is correct because wrought iron contains a very small amount of carbon, which exists both as iron carbide (

Fe_3C

) and as free graphite.

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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

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C produce A compound in which a metal ion

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

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\sqrt {24}

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