How can the following conversions be brought about:
(i) Acetic acid to methyl cyanide. 
(ii) Acetaldehyde to formaldehyde. 
(iii) Nitrobenzene to 2, 4, 6 tribromoaniline.

Identify the reagents A, B, C, D, E and F required for the following conversion:

33.

The deficiency of which vitamin will cause the following diseases:
(i) Scurvy
(ii) Haemorrhages

Give one chemical test to distinguish between the following pairs of compounds: 
(i) Ethanol and 2 propanol.

(ii) Aniline and ethylamine

Write the structures of all enantiomers possible for lactic acid.

Give balanced equations for the following reactions: 
(i) Acetaldehyde is heated with hydroiodic acid in the presence of red phosphorous.
(ii) Calcium acetate is subjected to dry distillation.
(iii) Sodium ethoxide is treated with ethyl bromide.
(iv) Benzaldehyde is treated with sodium bisulphite.

An organic compound A with molecular formula C7H8 on oxidation by chromylchloride in the presence of CCl4 gives a compound B which gives positive tollen’s test. The compound B on treatment with NaOH followed by acid hydrolysis gives two products C and D. C on oxidation gives B which on further oxidation gives D. The compound D on distillation with soda lime gives a hydrocarbon E. Below 60oC, concentrated nitric acid  reacts with E in the presence of concentrated sulphuric acid forming a compound F. Identify the compounds A, B, C, D, E and F.

Give balanced equations for the following name reactions: 
(i) Clemmensen’s reduction.
(ii) Kolbe’s electrolytic reaction.
(iii) Balz-Schiemann’s reaction.

(i) What do you observe when glucose is treated with bromine water? 
(ii) What is isoelectric point?

Answer the following:
(i) What is biuret test?
(ii) Write balanced equation for the formation of biuret.