Which of the following indicator is used to identify only basic substances? * 1 point A. Methyl orange B. Universal indicator C. Phenolphthalein D. Methyl blue
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Explanation:
Methyl orange, Universal indicator shows colour change in both acidic and basic medium.
Methyl Blue is not the acid-base indicator.
Phenolphthalein changes its colour (to Magenta) in basic medium and remain colourless in Acidic medium
That's why answer can be C.Phenolphthalein
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