Q.

The TLV values of four pollutants A, B, C and D are 9ppm, 10 ppm, 100ppm and 500 ppm respectively. The most toxic among them is

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a

A

b

B

c

C

d

D

answer is A.

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Detailed Solution

Degree of pollution (toxicity)∞1TLV(threshold limit value) so  'A' is more toxic
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