Q18 of 26 Page 1

Write the name of monomers and their structures in the following: (i) Buna-N (ii) PVC (iii) Neoprene

(i) The monomer of Buna-N is 1, 3 – butadiene and acrylonitrile.



(ii) The monomer of PVC is Vinyl chloride.



(iii) The monomer of neoprene is 2- Chloro- 1, 3- butadiene.



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16

Give reasons:

(i) PCl5 is more covalent than PCl3.


(ii) O-O bond has lower bond dissociation enthalpy than S-S bond.


(iii) F2 is a stronger oxidizing agent than Cl2.


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Complete the following reactions:


 19

(i) Draw the pyranose structure of glucose.

(ii) What type of linkage is present in proteins?


(iii) Give one example each for water-soluble vitamins and fat-soluble vitamins.


 20

(a) For the complex [Fe(CO)5], write the hybridization, magnetic character and spin of the complex. (At. number: Fe = 26)

(b) Define crystal field splitting energy.