कौन-सा कथन सत्य है? (A) \( \mathrm{Fe}^{2+} \) अमोनियम थायोसायनेट के साथ भूरा रंग देता है (B) \(...

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कौन-सा कथन सत्य है?
(A) \( \mathrm{Fe}^{2+} \) अमोनियम थायोसायनेट के साथ भूरा रंग देता है
(B) \( \mathrm{Fe}^{2+} \) पोटैशियम फेरीसायनाइड के साथ नीला अवक्षेप देता है
(C) \( \mathrm{Fe}^{3+} \) पोटेशियम फेरीसायनाइड के साथ भूरा रंग देता है
(D) \( \mathrm{Fe}^{3+} \) पोटैशियम फेरीसायनाइड के साथ लाल रंग देता है
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