Page Number- 9

(1) Normally rainwater has a pH??

  • A. 3.6
  • B. 12.5
  • C. 5.6
  • D. 1.6
0
(c) 5.6

(2) The maximum limit of nitrates in drinking water as per international standards?

  • A. 50 ppb
  • B. 50 ppm
  • C. 55 ppb
  • D. 55 ppm
0
(b) 50 ppm

(3) Which of the following is a greenhouse gas??

  • A. Dinitrogen
  • B. Oxgyen
  • C. Ozone
  • D. All
0
(c) Ozone

(4) Which of the following gases is responsible for global warming??

  • A. O3
  • B. SO3
  • C. H2O
  • D. CO2
0
(d) CO2

(5) 'Blue baby' syndrome is caused by which element in drinking water??

  • A. Zinc
  • B. Copper
  • C. Sulphate
  • D. Nitrate
0
(d) Nitrate

(6) Which element is a major contributor to acid rain?

  • A. SO2
  • B. O2
  • C. CO2
  • D. CO
0
(a) SO2
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