Photosynthesis In Higher Plants Question 2

Question: The oxygen produced during photosynthesis comes from photolysis of water was first time proved by [MP PMT 1984, 88, 95]

Options:

A) Ruben and Kamen

B) Robert Mayer

C) Malvin Calvin

D) Blackman

Show Answer

Answer:

Correct Answer: A

Solution:

Photolysis is occur in persence of light quanta and requires $ M{n^{++}} $ and $ C{l^{-}} $ ions as catalyst for water oxidising.

$ 4H_2O\xrightarrow{M{n^{++}}C{l^{-}}}4{{(OH)}^{-}}+4{H^{+}} $ Then H radicle formes water and $ O_2 $ as a by-product $ 4OH\xrightarrow{{}}2H_2O+O_2\uparrow $