Which of the following compound (s) will give butanone on oxidation with alkaline KMnO4 solution?
Butan-1-ol
Butan-2-ol
Both (a) and (b)
None of the above
The order of reactivity of the following alcohols is
1 > 2 > 3 > 4
1 > 3 > 2 > 4
4 > 3 > 2 > 1
4 > 3 > 1 > 2
C.
4 > 3 > 2 > 1
The order of reactivity depends on the stability of the carbo cations of the respective species. The carbocations formed are
F.CH2.H.CH3, FCH2.CH2H.CH3
CH3.H.CH3 and Ph.H2
The stability order of carb-cation is
PhH2 > CH3.H.CH3 > F.CH2.CH2.H.CH3 > F.CH2.CH2.H.CH3 > FCH2H.CH3
Hence, order of reactivity follows the order (4) > (3) > (2) > (1)
What will be the order of reactivity of the following carbonyl compounds with Grignard's reagent?
I > II > III >IV
IV> III > II >I
II> I> IV >III
III> II> I >IV
Phenol is heated with phthanlic anhydride in the presence of conc. H2SO4. The product gives pink colour with alkali. The product is
phenolphthalein
bakelite
salicylic acid
flurorescein