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
Order of boiling point is :
HF > HI > HBr > HCl
HF > HBr > HI > HCl
HCl > HBr > HI > HF
HCl > HI > HBr > HF
Order of hydrolysis for the following :
RCOCl
RCOOR
RCONH2
(RCO)2O
A.
RCOCl
In acid derivatives acid chlorides is most reactive , it is vigorously hydrolysed by water .
CH3COCl + H2O CH3COOH + HCl
Acid anhydride is less reactive than acid chlorides .It is hydrolysed slowly by water .
(CH3CO)2O + H2O 2CH3COOH
The hydrolysis of ethyl acetate in boiling water is slow but inthe presence of acid or alkali the reaction is fast .
CH3CO-OC2H5 + H2O CH3COOH + C2H5OH
Amides are hydrolysed by water very slowly .
R--NH2 + H2O R-COOH + NH3
Thus , the correct order of hydrolysis is
RCOCl > (RCO)2O > RCOOR > RCONH2
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)