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Acids, Bases and Salts — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryAcids, Bases and Salts1 Mark
MCQ
Methyl orange is :
  • ✓
    Red in acidic medium, yellow in basic medium
  • B
    Yellow in acidic medium, pink in basic medium
  • C
    Colourless in acidic medium, pink in basic medium
  • D
    Pink in acidic medium, colourless in basic medium
✓

Answer

Correct option: A.
Red in acidic medium, yellow in basic medium
(a) Red in acidic medium, yellow in basic medium
Explanation : Methyl orange shows clear and distinct colour variance at different pH values, due to which it is often used as a pH indicator in titration. Methyl orange shows a red colour when the pH of the solution is less than 7 (acidic medium) and shows a yellow colour when the pH is above 7 (basic medium).

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