Question

Mixed indicator used in the titration of the distillate in MicroKjeldahl method is made up of

• A. Methyl orange and methylene blue
• B. Methyl orange and methyl red
• C. Methylene blue and bromocresol red
• D. Methyl red and methylene blue

Hint:

Remember the color transitions of Tashiro's mixed indicator:
- Alkaline (before titration starts) $\rightarrow$ Green.
- Endpoint (neutralization) $\rightarrow$ Grey.
- Acidic (after the endpoint is passed) $\rightarrow$ Reddish-violet.

Answer 1

The Correct Option is D