# 12. (a) Write the structure of Vitamin C (ascorbic acid). [1] (b) Show the structure of...

###### Question:

12. (a) Write the structure of Vitamin C (ascorbic acid). [1] (b) Show the structure of the specie which exist at pH 7.4. [1] (c) Show how this specie formed reacts with a free radical R.[1] (d) What two products are formed as a result? [1+1] (e) Show (with the help of a chemical equation) why the radical chain reaction does not proceed any further? [1] (1) Explain why Vitamin C acts as a radical scavenger? [1]

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