Question 4 — A liquid sample from the laboratory - Questions at the end of the chapter - Chapter 2 Class 7 - Exploring Substances: Acidic, Basic, and Neutral

Last updated at August 16, 2026 by

Q4 (Medium): A liquid sample from the laboratory was tested using various indicators: Red litmus - No change; Blue litmus - Turned red; Turmeric - No change. Based on the tests, identify the acidic or basic nature of the liquid and justify your answer.

Answer:
We have studied that acidic substances turn blue litmus red and show no change with red litmus and turmeric . This is why the liquid is acidic.

  • Blue litmus turns red - indicates acid
  • Red litmus shows no change - confirms acid
  • Turmeric shows no change - confirms acid
  • All tests point to acidic nature
Indicator Test Results Blue Litmus Turns red - acidic Red Litmus No change - acidic Turmeric No change - acidic Conclusion Liquid is acidic
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