Question

which is the word equation for photosynthesis?
○ carbon + hydrogen + oxygen → glucose + water
○ glucose + water → carbon dioxide + oxygen
○ carbon dioxide + water → glucose + oxygen
○ glucose + oxygen → carbon + water + oxygen

Explanation:

Photosynthesis is the process by which plants use carbon dioxide (\(CO_2\)) and water (\(H_2O\)) in the presence of light energy to produce glucose (\(C_6H_{12}O_6\)) and oxygen (\(O_2\)). So the correct word equation should have carbon dioxide and water as reactants and glucose and oxygen as products.

• The first option has incorrect reactants (carbon, hydrogen, oxygen instead of \(CO_2\) and \(H_2O\)).
• The second option is the reverse (like respiration, not photosynthesis).
• The fourth option is also incorrect in reactants and products.
• The third option (carbon dioxide + water → glucose + oxygen) matches the photosynthesis process.

Answer:

C. carbon dioxide + water → glucose + oxygen (assuming the third option is labeled C; if the original options had labels like A, B, C, D, adjust the label as per the original, but based on the content, the correct one is the third option with reactants carbon dioxide and water, products glucose and oxygen)