पुर्ण आयनीकरण को मानते हुए निम्नलिखित में से कौनसे यौगिक के पुर्ण ऑक्सीकरण में सबसे कम मात्रा में अम्लीय $KMnO _4$ की आवश्यकता होगी?
- ✓(a) $FeSO _4$
- B(b) $FeSO _3$
- C(c) $FeC _2 O _4$
- D(d) $Fe \left( NO _2\right)_2$
Answer: A.
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