Question

What is Hill reagents or Hill oxidants?

Answer 1

These Oxidants are dyes which acts as a Artificial electron Acceptors in Solutions it also changes colors when it is reduced or diluted

Answer 2

hill reagents is

 the photosynthesis reaction that involves the photolysis of water and the liberation of oxygen and does not include carbon dioxide fixation. It involves the addition of oxidants  to chloroplasts; upon illumination, O2 is evolved and the added oxidant is reduced.