Acids, Bases and Salts — Science STD 10 — Question
CBSE BoardEnglish MediumSTD 10ScienceAcids, Bases and Salts1 Mark
MCQ
Acetic acid solution turns :
✓
Blue litmus red.
B
Red litmus blue.
C
Blue litmus colourless.
D
Red litmus colourless.
✓
Answer
Correct option: A.
Blue litmus red.
Under acidic conditions, the phenol is protonated and results in a red color. The process is reversible so if a solution becomes acidic, litmus will be red. Blue litmus is the deprotonated form and when you put it in acetic acid it will become protonated and turns red.
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