2... · 2020-01-31 · Il, CO, (earbc,nic The Statotncut universal it an indicator having pH 7 (b)...
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2... · 2020-01-31 · Il, CO, (earbc,nic The Statotncut universal it an indicator having pH 7 (b) i' gives blue at pH 3 it colourless pH 7 : it pH 3 Its colour orange at pH S. A