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17 June, 01:33

Which is a disadvantage of using chemical indicators?

They are expensive to use.

They measure pH directly.

--> (((They must be selected for a narrow pH range.))) <---

They do not use electricity to operate.

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Answers (2)
  1. 17 June, 02:52
    0
    They must be selected for a narrow pH range.
  2. 17 June, 03:04
    0
    Third option is correct
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