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Course: UP Class 10th Science > Unit 2

Lesson 1: Week 1
Science
UP Class 10th Science
Acids, Bases and Salts
Week 1
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Acids and Bases in the Laboratory

Google Classroom

Problem

To detect the presence of acids and bases, Micheal adds a few drops of phenolphthalein indicator to two colorless solutions, A and B.
He observes the following changes in the solutions:
  • A:colorless→pink
  • B:colorless→colorless
What does he conclude?
Note: Phenolphthalein indicator is colorless.
Choose 2 answers: