Colourful indicator of possible acidic extent (6,5) |
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It may turn pink or blue |
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Test material that mashes up simple art (6,5) |
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Means of identifying acidity or alkalinity of a substance (6,5) |
The Guardian Speedy |
09 Sep 2024 |
Means of identifying acidity or alkalinity of a substance (6,5) |
The Guardian Speedy |
08 Sep 2024 |
Solution tester |
Newsday |
24 Feb 2024 |
Student corruptly taps umpire for test sheet |
The Telegraph Toughie |
09 Oct 2019 |
Acidity-testing strip |
Newsday |
29 Nov 2017 |
Acidity tester |
Thomas Joseph |
22 May 2017 |
Acid test substance |
LA Times Daily |
15 May 2016 |
Acid test substance |
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Equipment for one who drops acid? |
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