The colour of methyl orange in base is?
Correct answer: B. Yellow
- A. Red
- B. Yellow
- C. Orange
- D. Pink
Explanation
Methyl orange is an acid-base indicator that is red in acidic medium. In basic solution, it changes to its yellow form. Thus, its colour in a base is yellow.
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About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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