Exam questionKROK 2Pharmacy ยท 2013
Specific impurity of thiosulfates in Natrii iodidum and Kalii iodidum is identified by adding starch and iodine solutions. The absence of impurities is proved by:
Answer options
- White precipitate
- Discolouration of the solution
- Blue colour
- Disappearance of the blue colour
- Yellow colour
Correct answer
Blue colour
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