A paper impregnated with an indicator that changes color under known conditions, used especially to test for acidity.
- Mortality with 4 per cent DDT impregnated test papers was 17.5 per cent.
- When using the test paper, first add a few drops of hydrochloric acid to the solution to be tested.
- In acid solution, oxidizing agents react with the iodide in the test paper to liberate iodine.
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Syllabification: test pa·per
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