(1) When the pH of rain water is below 3.6, it is called acid rain. |
(2) Ozone hole occurs over Antarctica mainly during September-October and it gets replenished in November-December. |
(3) Methyl cyclohexane is an ozone-depleting molecule. |
(4) COD is always larger than BOD. |
A) TTTF
B) FTFT
C) FFFF
D) FTTT
Correct Answer: B
Solution :
(1) When the pH of rain water is below 5.6, it is called acid rain. |
(2) Ozone hole occurs over Antarctica mainly during September-October and it gets replenished in November-December. |
(3) Methyl cyclohexane is not an ozone-depleting molecule. |
(4) BOD (Biological oxygen demand) is a measure of organic pollutant present in the sample of water. |
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