Question

11. Which of the following solutions will turn phenolphthalein pink?
(a) Mg(OH)2(aq)
(b) CO2 (aq)
(c) KOH(aq)
(d) HNO3 (aq)
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Answer 1

Mgoh2 and kohl as it is a base

Answer 2

HNO3 is the answer hope it helps