Answer:
Chemotrophs require inorganic compound and produce organic compound while phototrophs require solar radiation and produce organic compound.
Explanation:
Inorganic compound are those which have no carbon and hydrogen is present while organic compound are those which is made of hydrocarbons i. e. hydrogen and carbon. Chemotrophs are the organisms which make their food from inorganic chemical compounds while phototrophs are the organisms which make their food from sunlight. Food which is produced in photosynthesis is glucose molecule.