National Dental Examining Board of Canada (NDEB) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Master your National Dental Examining Board of Canada (NDEB) exams with our comprehensive practice guide. Achieve excellence in your dental certification with expertly crafted questions and detailed explanations.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What chemical is used to retard setting in alginate?

Potassium sulphate
Sodium phosphate
Calcium chloride
Magnesium sulfate

The correct answer is: Sodium phosphate

Sodium phosphate is used to retard the setting in alginate. The other options, potassium sulphate, calcium chloride, and magnesium sulfate, are commonly used in dental materials but do not have the same retarding effects on alginate.