Q: 10 (SSC/NA)
question_subject:
Science
question_exam:
SSC
stats:
0,25,18,17,25,1,0
keywords:
{'photosynthesis': [20, 0, 4, 11], 'carbon dioxide': [2, 0, 5, 6], 'liberated gas': [1, 0, 0, 0], 'oxygen': [3, 0, 1, 0], 'hydrogen': [0, 0, 1, 3], 'nitrogen': [1, 1, 0, 2]}
During photosynthesis, plants use light energy to convert carbon dioxide (option 1) and water into glucose (food for the plant) and release oxygen (option 2) as a byproduct. This process occurs in the chloroplasts of the plant cells. The chlorophyll pigment in the chloroplasts absorbs light energy, which is used to split water molecules into oxygen and hydrogen. The hydrogen is then used to combine with carbon dioxide to produce glucose through a series of chemical reactions. Oxygen is released into the atmosphere as a waste product. Therefore, option 2, oxygen, is the correct answer. The other options, nitrogen (option 3) and hydrogen (option 4), are not the liberated gases during photosynthesis.