Question

Food preservative in tomato ketchup is a) sodium acetate
b) sodium benzoate c) sodium salicylate
d) sodium propionate

Answer 1

may be answered is sodium acetate not sure

Answer 2

In the chlorine and iodide case, the reaction takes place and exists water to oxygen and set with impossible reaction.

This should be identified with chlorine and bromine that similarly bromine that is more powerful oxidising agent.

It includes oxidize with iodine and bromine that has been powerful oxidizing agent.