If universal indicator shows blue, the solution is categorized as?

If universal indicator shows blue, the solution is categorized as?

• A. Strong alkali
• B. Weak alkali
• C. Neutral
• D. Weak acid

Answer: (B)

Universal indicator colors map to pH and whether a solution is acidic or alkaline. Blue shows the solution is alkaline (pH above 7). The shade tells how strong the alkali is: a dark blue or purple indicates a strong alkali, while a lighter blue indicates a weaker alkali. Since the color is blue but not a very dark shade, it points to a weak alkali. Neutral would be green, and acids would be red/orange/yellow depending on strength, so those aren’t applicable here.

Universal indicator colors map to pH and whether a solution is acidic or alkaline. Blue shows the solution is alkaline (pH above 7). The shade tells how strong the alkali is: a dark blue or purple indicates a strong alkali, while a lighter blue indicates a weaker alkali. Since the color is blue but not a very dark shade, it points to a weak alkali. Neutral would be green, and acids would be red/orange/yellow depending on strength, so those aren’t applicable here.