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`Cr^(2+)` तथा `Mn^(3+)` के विषय में निम्न में से कौन-सा/से कथन सही है/है ? [परमाणु क्रमांक `Cr=24,Mn=25`]

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Correct Answer - A::B::C
(a) `Cr^(2+)` एक अपचयक है, यह `Cr^(3+)` में ऑक्सीकृत हो जाता है ।
(b) `Mn^(3+)` एक ऑक्सीकारक है, यह `Mn^(2+)` में अपचयित हो जाता है ।
`C(24)=3d^(4) 4s^(2), Cr^(2+)=3d^(4)`
`Mn(25)=3d^(5)4s^(2), Mn^(3+)=3d^(4)`
(d) जब `Cr^(2+)` को अपचायक की भाँति प्रयोग करते है तो क्रोमियम आयन `` इलेक्ट्रॉनिक विन्यास दिखता है।

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