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  9. Q34

Telangana Police SI 2018 · Question 34 of 96

Identify the correct statements from the following: (a) CFCs are responsible for depletion of Ozone layer. (b) Water vapour, methane, CO2, CFCs, nitrous oxide are green house gases. (c) The BOD value of pure water is 100 ppm.

environment

  1. A(a), (b)Correct
  2. B(a), (c)
  3. C(a), (b), (c)
  4. D(b), (c)

Answer: A. (a), (b)

Explanation

[2018 PWT Q110] (a) and (b) are true; (c) is false since pure water has negligible BOD (100 ppm indicates heavy pollution). Verified against the official TSLPRB preliminary key (Booklet D).

Source: TS SI PWT 2018 official paper (Booklet D); answer cross-verified with the official TSLPRB preliminary key

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