MCQ
Aspirin is an acetylation product of
- ✓$o - $hydroxybenzoic acid
- B$o - $dihydroxybenzene
- C$m - $hydroxybenzoic acid
- D$p - $dihydroxybenzene

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$P =\left[ FeF _6\right]^{3-}, Q =\left[ V \left( H _2 O \right)_6\right]^{2+} \text { and } R =\left[ Fe \left( H _2 O \right)_6\right]^{2+} \text {. }$
The correct order of the complex ions, according to their spin-only magnetic moment values (in $B.M.$) is