

MCQOPTIONS
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1. |
CONCENTRATION_OF_WATER-SOLUBLE_SULPHATES_IN_WATER_____________PPM_FOR_MILD_EXPOSURE.?$ |
A. | <150 |
B. | 150-1500 |
C. | 150-10000 |
D. | >10000 |
Answer» B. 150-1500 | |