A) \[5M\,NaOH\]
B) \[0.1M\text{ }NaC{{O}_{3}}\]
C) \[0.1M\text{ }N{{H}_{4}}OH\]
D) \[0.1M\text{ }NaCl\]
Correct Answer: A
Solution :
pH of \[5M\]\[NaOH\] is high in the given solution.. So it gives red colour with HPh.
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