Q

The dark blue colour in the pH scale refers to ________.

JE CBT-1, 16-Dec-24 S-1 2024
✓ Answer: D strong basic solution
On the pH scale, a dark blue colour usually indicates a strong base (alkaline solution). A strong basic solution has a pH between 12 and 14. Examples include sodium hydroxide (NaOH) or potassium hydroxide (KOH) solutions. Acids are shown by red/orange, neutral by green, and weak bases by lighter blue.
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