1. WHICH TYPE OF SALT IS [Cu(NH₂)₄] ?2.WHAT TYPE OF SOLUTION SHOULD BE PREPARED TO OBTAIN CRYSTALS? SATURATED OR UNSATURATED?WHY?3. WRITE COMMON NAME IUPAC NAME OF PICRIC ACID.

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2) Saturated solution should be prepared to obtain crystals and not unsaturated solution as a saturated solution contains as much solute as possible without forming a precipitate. This is the maximum concentration of solute and recrystallization from this solution is easily done while the unsaturated contains very less concentration of solute and hence recrystallization from it is not possible.

3) Common name is Picric acid
IUPAC name is 2,4,6 trinitrophenol

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