Question:
Red colour complex ion formed on adding $FeCl_3$ to S.E. (sodium extract) when N and S both are present in organic compound is
Red colour complex ion formed on adding $FeCl_3$ to S.E. (sodium extract) when N and S both are present in organic compound is
Updated On: Jul 28, 2022
- $[Fe(CN)_6]^{4-}$
- $[Fe(CNS)]^{2+}$
- $[Fe(CNS)_2]^+$
- $[Fe(CN)_6]^{3-}$
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The Correct Option is B
Solution and Explanation
$ {Na + C + N + S ->[\Delta]}$$\underset{\text{Sodium thiocyanate (In S.E.)}}{ {CH3COOH}}$
$ {NaCNS + FeCl3 ->}$$ {+}$$\underset{\text{Blood red colour}}{ {[Fe(CNS)]Cl2}}$ $ {+ NaCl}$
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Notes on Methods Of Purification Of Organic Compounds
Concepts Used:
Purification of Organic Compounds
We commonly use these methods for the purification of substances:
- Simple crystallization - The most common method that we use to purify organic solids.
- Fractional crystallization - It is the process of separation of different components of a mixture by repeated crystallisations.
- Sublimation - Certain organic solids on heating directly change from solid to vapor state without passing through a liquid state. These substances are sublimable. This process is sublimation.
- Simple distillation - It is the joint process of vaporization and condensation.
- Fractional distillation - It is the process to separate a mixture of two or more miscible liquids which have boiling points close to each other
- Distillation under reduced pressure
- Steam distillation
- Azeotropic distillation
- Chromatography