Question

true or false,During photocatalysis, recombination is not an issue

Answer 1

Answer: True

Explanation:  

A photo catalysis reaction is a process in which the photo reaction is accelerated by a catalyst where the catalyst is a substrate which absorbs light to boost up the reaction. Photo catalytic activity depends upon the production of electron pair holes to generate free radicals which are responsible for the secondary reaction that are going on.

The practical application of photo catalytic reaction is water electrolysis which is conducted with the help of titanium dioxide. So the recombination is not possible during photo catalysis reaction.

Answer 2

During photo-catalysis, recombination is not an issue.

This statement is true.

Explanation:

• A Photo-catalysis reaction is that in which a catalyst is used.
• A catalyst increases the speed of the reaction but itself remains unreacted and can be obtained at the end of the reaction.
• Photo-catalysis is a chemical redox reaction.
• The electron-hole recombination reaction decreases during the photo-activated reaction.
• Therefore recombination reaction is not an issue during this chemical process.