exceptions in organic chemistry!!!!!

@Aveek: nothing co-relating. It's just Test-Series. :D

HCOOH..Formic Acid shows positive Tollen's and Fehling's test..

The attack of NO⁺ on benzene is faster than NO₂⁺

In case of non-polar medium the formation of NO₂⁺ is the slow step... and in case of polar solvents the removal of proton will be the slowest step in Nitration...
The vant hoff factor in Nitration mixture is ≈ 3.82

In case of Sulphonation the electrophile is SO₃

esters having one α - hydrogen do not undergo claisen condensation reaction..........

however with strong bases such as triphenylmethyl sodium, some esters like ethyl isobutyrate undergo claisen condensation ..

not an exception but it's good to know these----

[1][1][1]nice work friends[1][1][1].thanx to u all......

P.S.yes,abhishek.......no such thing tht u only need to post exceptions any such thing which is rare to find n notice+exceptions+other properties+more........caN BE ADDED[1]

@abhishek : for Claisen condensation : I didn't know that! But how can this be true. I mean, there is well defined reason why atleast 2 alpha hydrogen is required for Mr. Claisen... How will it attain equilibrium going with that fact..