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Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsEasy
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What colour does methyl orange show in a basic solution?

Answer and explanation

Correct answer: Yellow

The governing concept is indicator colour change with pH. Methyl orange is red in an acidic medium, but in a basic medium its colour is yellow. Therefore option B is correct. Red is the relevant distractor because it is the colour seen in acid, while black and blue are not the characteristic colours of methyl orange in this test. The observation helps distinguish acidic and basic solutions.

Related tags

Methyl OrangeBasic SolutionAcid-Base IndicatorAcidsBasesAnd 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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