MCQ
The oxidation state of $Mn$ in ${K_2}Mn{O_4}$
- A$+2$
- B$+7$
- C$-2$
- ✓$+6$
$2 + x - 2 \times 4 = 0$
$x = 8 - 2 = + 6$.
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| List $I$ Element detected | List $II$ Reagent used/Product formed |
| $A$ Nitrogen | $I.$ $Na _2\left[ Fe ( CN )_5 NO \right]$ |
| $B$ Sulphur | $II.$ $AgNO _3$ |
| $C$ Phosphorous | $III.$ $Fe _4\left[ Fe ( CN )_6\right]_3$ |
| $D$ Halogen | $IV.$ $\left( NH _4\right)_2 MoO _4$ |
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