Identify the correct stereochemical relationship amongst the hydrogen atoms Ha, Hb and Hc in the following molecule

A. Ha and Hb : enantiotopic
B. Ha and Hb : diastereotopic
C. Ha and Hc : enantiotopic
D. Ha and Hc : diastereotopic
Answer: Option A
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
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