MCQ
Which one will change from red litmus to blue$?$
- A$NaCl$
- B$HCl$
- ✓$KOH$
- D$LiOH$
for correct option:
In basic (or alkaline) solution, red litmus turns blue.
$C:$ Since $KOH$ is a strong base thus, it will turn red litmus blue.
$D: LiOH$ is a strong base and thus, it will turn red litmus blue.
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