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Oxidation States of Lanthanides

The newly dis...

Question

The newly discovered high-temperature superconductors are:

A

ceramic oxides

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B

pure rare-earth metals

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C

metal alloys

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D

inorganic polymers

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Solution

The correct option is B ceramic oxides
Around $1993$ , the highest temperature superconducting material was known. It has been a ceramic material consisting of $H g, B a, C a, C u$ and $O$ i.e, the compound was $H g B a_{2} C a_{2} C u_{3} O_{2}$

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