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Which of the following is a common laboratory indicator for bases?

Which of the following is a common laboratory indicator for bases?
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A Methyl orange
  • B Phenolphthalein
  • C Bromothymol blue
  • D Litmus
Correct Answer: Option B
Explanation:
Phenolphthalein is a common laboratory indicator used to detect the presence of bases in a solution. In its basic form (pH > 8.3), it turns pink or purple, indicating the presence of a base.

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