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Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsEasy
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What is the colour of methyl orange in an acidic solution?

Answer and explanation

Correct answer: Red

The governing concept is indicator colour change with pH. Methyl orange is a synthetic acid-base indicator that appears red in an acidic medium, changes through orange in its transition range, and appears yellow in a sufficiently basic medium. Because the question specifies an acidic solution, the correct observation is red. Yellow corresponds to the basic side, while blue and pink are not the standard methyl-orange colours for this test. Therefore option A is correct.

Related tags

Methyl OrangeIndicatorAcidAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience
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10 more MCQs
  1. 1What type of substance turns blue litmus paper red?
  2. 2What type of substance turns red litmus paper blue?
  3. 3Which of the following substances acts as a natural indicator?
  4. 4What is the general nature of an aqueous soap solution?
  5. 5Which of the following substances turns red litmus paper blue?
  6. 6What is the nature of a solution whose pH is less than 7?
  7. 7At 25°C, a solution with a pH greater than 7 is of which nature?
  8. 8A student dips red litmus paper into a soap solution. What change will occur in the red litmus paper?
  9. 9Which gas is generally produced when dilute acids react with active metals?
  10. 10A student dips red litmus paper into a soap solution. What will be the colour of the litmus paper?
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