Exams › JEE Main › Chemistry

In biological systems, which element is involved in the oxidation of water to molecular oxygen (O2)?

1. Fe
2. Mn
3. Cu
4. Mo

Correct answer: Mn

Solution

In photosystem II the oxygen-evolving complex is a manganese (Mn4Ca) cluster that catalyses the oxidation of water to O2. So manganese is the element involved in biological water oxidation.

Related JEE Main Chemistry questions

• Which of the following arrangements shows the decreasing order of acidic nature?
• Which one of the following oxides shows amphoteric behaviour?
• In boric acid (H₃BO₃), the hybridization states of the boron atom and the oxygen atoms are, respectively,
• A xenon fluoride compound contains 53.5% xenon by mass. What oxidation state does xenon have in this compound?
• For a cement of good quality, what should be the approximate ratios of the following? I. Silica to alumina II. CaO to the combined oxides of SiO2, Al2O3 and Fe2O3
• Because the ns² electrons of the valence shell do not readily take part in bonding, which statement is correct?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →