Statement I: Autotroph plants contain the pigment chlorophyll for meeting their requirement of carbon and energy. Statement II: Photosynthesis is the process of converting water into food using sunlight and oxygen.

Statement I is true as autotrophic plants utilize the pigment chlorophyll to absorb light energy, which is essential for fulfilling their carbon and energy requirements through the synthesis of carbohydrates [5]. Chlorophyll acts as a photoreceptor, enabling the conversion of light energy into chemical energy [t2]. Statement II is false because photosynthesis is the process of converting carbon dioxide and water into glucose (food) and oxygen in the presence of sunlight [c3][t1]. Oxygen is a byproduct (waste product) of the reaction, not a reactant [t3][t9]. In photosynthesis, water is oxidized and carbon dioxide is reduced to form carbohydrates [t8]. The use of oxygen to break down food for energy is actually the process of cellular respiration, which is distinct from the food-making process of photosynthesis [t1][t7].

Sources

1. [2] Science-Class VII . NCERT(Revised ed 2025) > Chapter 10: Life Processes in Plants > In a Nutshell > p. 150
2. [5] https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/chlorophyll-a