Light green solution of (A) does not give blue coloured ppt . With `K_(4)[Fe(CN)_(4)]` but on adding a drop of `HNO_(3)` blue ppt .(B) appears .However (A) gives blue colour (C ) with `K_(4)[Fe(CN)_(6)]` Identify (A) if it, also gives white ppt with AgNO 3 ​ solution?

Explanation

To solve the problem, we need to analyze the information given step by step.

### Step 1: Identify the light green solution (A)
The light green solution (A) is likely to be **FeCl₂** (Iron(II) chloride). This is because FeCl₂ is known to produce a light green solution due to the presence of Fe²⁺ ions.

### Step 2: Reaction with K₄[Fe(CN)₆]
When FeCl₂ is mixed with K₄[Fe(CN)₆] (Potassium ferrocyanide), it does not produce a blue precipitate initially. This is because the Fe²⁺ ions from FeCl₂ do not react with K₄[Fe(CN)₆] to form the blue precipitate (Prussian blue) unless there is a specific condition that allows the reaction to proceed.

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