Single correct option
Consider the following statements:
1. Acids turn blue litmus paper red.
2. Bases turn colourless phenolphthalein solution pink.
Which of the statements given above is/are correct?
1. Acids turn blue litmus paper red.
2. Bases turn colourless phenolphthalein solution pink.
Which of the statements given above is/are correct?
- A. 1 only
- B. 2 only
- C. Both 1 and 2
- D. Neither 1 nor 2
Show answer and solution
Answer: (C) Both 1 and 2
Blue litmus turns red in acid, so statement 1 is correct. Phenolphthalein is colourless in acid and neutral solutions and turns pink in basic solutions, so statement 2 is also correct. These are standard indicator tests from NCERT. Methyl orange, in contrast, turns red in acid and yellow in base.
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