For the aldotetroses I-IV, the combination of true statements, among P-T, is

P = I and II are diastereomers and II and III are enantiomers
Q = I and IV are mesomers and are optically inactive
R = I and III can be interconverted by a base catalysed isomerisation
S = only I and IV are HlO4 cleavable
T = I and III are D-sugars and II and IV are L-sugars
A. Q, R, T
B. P, R, T
C. Q, R, S, T
D. P, Q, S
Answer: Option D
A. CH3C$${\text{O}}_2^ - $$ > CH3O- > C6H5O- > N$${\text{O}}_3^ - $$
B. CH3O- > N$${\text{O}}_3^ - $$ > C6H5O- > CH3C$${\text{O}}_2^ - $$
C. CH3O- > C6H5O- > CH3C$${\text{O}}_2^ - $$ > N$${\text{O}}_3^ - $$
D. C6H5O- > CH3O- > N$${\text{O}}_3^ - $$ > CH3C$${\text{O}}_2^ - $$
The most appropriate sequence of the reactions for carrying out the following conversion
is
A. (i) peracid, (ii) H+, (iii) Zn/dil.HCl
B. (i) Alkaline KMnO4, (ii) NalO4, (iii) N2H4/KOH
C. (i) Alkaline KMnO4, (ii) H+, (iii) Zn/dil.HCl
D. (i) O3/Me2S, (ii) NaOEt, (iii) N2H4/KOH
Conversion of Ph-NH2 into Ph-CN can be accomplished by
A. reaction with sodium cyanide in the presence of nickel catalyst
B. reaction with chloroform and sodium hydroxide
C. diazotisation followed by reaction with CuCN
D. reaction with ethyl formate followed by thermolysis
Join The Discussion