Chemistry Paper VIII Organic Chemistry Previous Year Question Paper Year 2005 : IIIrd Year

Q.I. (a) What is mutarotation ? Explain the formation of two anomers of glucose?

(b) How will you synthesise an aldopentose from aldohexose ?

(c ) Give the open chain and cyclic structure of D-fructose ?
Answer :

Q. 2. (a) Explain briefly
(i) Zwitter lon
(ii) Secondary structure of proteins

(b) Give the Sanger’s method for determination of N-terminal residue analysis of a peptide ?

(c ) What is the difference between essential and non-essential amino acids. Give one example of each ?
Answer :

Q. 3. (a) How will you synthesis α-Napthalene sulphonic acid and β-Napthalene sulphonic acid from napthalene ? 2

(b) Explain why pyridine is more basic than pyrrole ?

(c ) Image no. 2

(d) Explain the formation of glucosazone from glucose.
Answer :

Q.4 (a) Give the synthesis of Terylene or Dacron ?

(b) How will you synthesise
Acetylene—»Polyacrylonitrile 2

(c ) What are the monomers involved in the formation of following polymers ?
(i) Nylone6,6
(ii) Polyurethane 2

(d) How the structure of naphthalene was established?
Answer :

Q.5. (a) GiveamethodofpreparationofMalachitegreen.Give its uses. 3

(b) Why certain objects appear coloured ? Explain the concept of colour and constitution. 3

(c ) Why Edam’s method for determination of N~terminal residue analysis is more advantageous over Sanger’s method.
Answer :

Q. 6. Write short notes on :
(a) BHC
(b) Paracetamol
(c ) Chloroquine
(d) Isoelectric point
Answer :

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