In which of the following reactions carbon-carbon bond formation takes place ?
Cannizaro
Reimer - Tiemann
HVZ reaction
Schmidt reaction
Which gives only mono - substituted product ?
o - dinitrobenzene
m - dinitrobenzene
p - dinitrobenzene
Nitrobenzene
B.
m - dinitrobenzene
m - dinitrobenzene gives only mono - substituted product because - NO2 group is meta directing group and only one m - position is possiblein m - dinitrobenzene .
Order of boiling point is :
HF > HI > HBr > HCl
HF > HBr > HI > HCl
HCl > HBr > HI > HF
HCl > HI > HBr > HF
If the enolate ion combines with carbonyl group of ester , we get :
aldol
, - unsaturated ester
- keto aldehyde
acid
Which of the following compounds will react with NaHCO3 solution to give sodium salt and carbon dioxide ?
Acetic acid
n - hexanol
Phenol
Both (b) and (c)