Answer:
Substance a is carbon dioxide and substance b is oxygen
Explanation:
Photosynthesis is a distinct metabolical (anabolism) process that occurs in autotrophic organisms like plants, phytoplanktons etc. It is the process whereby food in form of an organic molecule (glucose) is produced by combining carbondioxide (CO2) and water (H2O) in the presence of sunlight.
The photosynthetic process is unique to autotrophs because of their ability to capture energy from sunlight using their Chlorophyll pigment. The process of photosynthesis occurs in the Chloroplast where Carbondioxide, water, and light energy are needed to synthesize glucose and release oxygen gas in the process. The overall equation of photosynthesis is:
6C02 + 6H2O + light -----> C6H12O6 + 6O2
Hence, according to the question;
Substance A reacts with water meaning that substance A is Carbondioxide (CO2).
Substance B is a gaseous product formed, meaning substance B is the released oxygen gas.
