Composition of Nessler's reagent

1. A.
   ${HgI}_{2}$
2. B.
   $K_{2}{HgI}_{4}$
3. C.
   ${KHgI}_{3}$
4. D.
   ${KHg}_{2}I_{2}$

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1. A.
   Oxygen
2. B.
   Potassium
3. C.
   Mercury
4. D.
   Iodine

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1. A.
   $Hg$
2. B.
   I
3. C.
   $K$
4. D.
   $N$

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