कौन-सा ऑक्साइड विद्युत चालक है? (A) \( \mathrm{V}_{2} \mathrm{O}_{5} \) (B) \( \mathrm{CrO}_{2} ...

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कौन-सा ऑक्साइड विद्युत चालक है?
(A) \( \mathrm{V}_{2} \mathrm{O}_{5} \)
(B) \( \mathrm{CrO}_{2} \)
(C) \( \mathrm{NiO} \)
(D) \( \mathrm{MnO} \)
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