Teaching MPPSC Assistant Professor Mock Test Series 2025 Chemistry d And f - Block Elements The Transition Elements (d-Block)

K2Cr2O7 और CrO5 में Cr की ऑक्सीकरण अवस्थाएँ क्रमशः क्या हैं?

1
+6, +5
2
+6, +10
3
+6, +6
4
इनमें से कोई नहीं
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