Photosynthetic bacteria liberate:

Correct answer: C. S

  • A. CO2
  • B. H2S
  • C. S
  • D. H
  • E. O

Explanation

In sulfur photosynthetic bacteria, the substance that donates hydrogen is hydrogen sulfide (H2S) and not water. Therefore there is no liberation of molecular oxygen, but there is a production of molecular sulfur (S2). (Oxygen and sulfur have same number of valence electrons.)

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