Nitrobenzene can be converted into azobenzene by reduction with
Zn/NaOH, CH3OH
Zn/NaOH
LiAlH4, ether
The one which is least basic is
NH3
C6H5NH2
(C6H5)3N
(C6H5)2NH
C.
(C6H5)3N
Presence of electron withdrawing group like Ph group decreases the electron density of nitrogen and hence, the lone pair of nitrogen are not available for donation. Thus, (C6H5)3N is least basic because of the presence of three electron withdrawing Ph(C6H5) groups.
On treatment of propanone with dilute Ba(OH)2 the product formed
aldol
phorone
propionaldehyde
4-hydroxy-4-methyl-2-pentanone
Which metal aprons are worn by radiographer to protect him from radiation?
Mercury coated apron
Lead apron
Copper apron
Aluminimised apron
Formation of cyanohydrin from a ketone is an example of
electrophilic addition
nucleophilic addition
nucleophilic substitution
electrophilic substitution
Glycerol on treatment with oxalic acid at 110°C forms
formic acid
allyl alcohol
CO2 and CO
acrolein
The reaction, ROH + H2CN2 in the presence of HBF4, gives the following product
ROCH3
RCH2OH
ROHCN2N2
RCH2CH3
The fatty acid which shows reducing property is
acetic acid
ethanoic acid
oxalic acid
formic acid