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30 January, 23:22

Are chemical hazards always visible?

A.) Yes

B.) No

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Answers (2)
  1. 31 January, 01:57
    0
    I would have to say B.) No, as well sorry if it's wrong
  2. 31 January, 02:05
    0
    No, they are not always visible. But can be detected by taste, or smell.
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