Limit Test Quiz

The material of the plant is considered a source of impurities due to:

• Errors in manufacturing processes

• Contamination from machinery or equipment

• Chemical reactions during storage

• Deliberate adulteration

Which of the following best defines an impurity?

• A foreign matter present in a compound

• A necessary component of a compound

• A test to determine the purity of a substance

• A method to measure a compound’s mass

What is the purpose of a limit test?

• To identify organic impurities

• To determine the purity of a compound

• To identify small amounts of impurities in a substance

• To measure the pH of a substance

What is the typical focus of a limit test?

• Organic impurities

• Inorganic impurities

• Biological contamination

• Structural integrity

The limit test for chloride is based on the reaction of soluble chloride with:

• Silver nitrate

• Barium chloride

• Iron(III) chloride

• Zinc sulfate

The limit test for iron involves the reaction of iron with which acid?

• Nitric acid

• Hydrochloric acid

• Thioglycolic acid

• Citric acid

In the limit test for sulphate, the formation of barium sulphate results in what observable change?

• Color change

• Turbidity

• Opalescence

• Gas evolution

Which of the following is typically used as an acid in the limit test for chloride to maintain an acidic medium?

• Hydrochloric acid

• Sulfuric acid

• Nitric acid

• Acetic acid

The limit test for sulfate is primarily based on the reaction of soluble sulfate with:

• Silver nitrate

• Barium chloride

• Calcium chloride

• Sodium sulfide

Which of the following heavy metals is typically tested using the limit test for heavy metals?

• Sodium

• Calcium

• Lead

• Magnesium