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  9. Q57

APSC CCE 2024 · Question 57 of 178

Consider the following statements: (i) Dark oxygen was discovered in 2013 by Andrew Sweetman while conducting ship-based fieldwork in the Pacific Ocean. (ii) Dark oxygen was discovered in 2013 by Andrew Sweetman while conducting research on dusty plasma in cometary tails. (iii) Dark oxygen refers to molecular oxygen that is produced in the total darkness of the very deep ocean. (iv) Dark oxygen refers to the medical oxygen cylinders, which are sold in the black market. Which of the above statements is/are correct?

Science & Tech/Current Affairs

  1. A(i) only
  2. B(ii) only
  3. C(iv) only
  4. D(i) and (iii) onlyCorrect

Answer: D. (i) and (iii) only

Explanation

Sweetman's team first recorded the anomalous deep-sea oxygen during 2013 Pacific fieldwork (published 2024); dark oxygen is molecular oxygen produced in the dark deep ocean by polymetallic nodules, so (i) and (iii) are correct; official key gives (D).

Source: APSC CCE Prelims 2024 GS Paper-I, official Series-A paper (DUCN-I-24/43-A), answer from official Series-A key

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