Q392
Sulphur dioxide is toxic to plant at or above
A.
0.1 - 0.3 ppm
B.
0.3 - 0.5 ppm
AnswerC.
0.5 - 0.6 ppm
D.
0.7 - 0.9 ppm
Answer: Option B
Solution
Answer: Option B
Solution:
Sulphur dioxide is toxic to plants at or above 0.3 - 0.5 ppm.Sulphur dioxide is a colourless gas at ambient temperature and pressure. It can be detected by taste at concentrations of 0.35 - 1.05 ppm and has a pungent, irritating odour with an odour threshold of 0.67 - 4.75 ppm.