QC Lab Semestral Pre-Test

This refers to the curve seen on top of a liquid in response to its container.

• Meniscus

• Meander

• Coil

This occurs when the molecules of the liquid are more strongly attracted to the container than to each other.

• Concave meniscus

• Convex meniscus

For colorless solutions, reading should be made at the lower meniscus.

• True

• False

This is a solution that is sufficiently accurate that it cannot be calibrated or subordinate to other standards.

• Primary standard

• Secondary standard

This is a substance that absorbs moisture from the air and dissolves into it becoming liquid.

• Deliquescent

• Hygroscopic

This is a type of reaction that involves the release of heat.

• Exothermic reaction

• Endothermic reaction

Adverse health effects due to exposure to sulfuric acid are both time-dependent and concentration-dependent.

• True

• False

Which of the following is the historical name of sulfuric acid?

• Oil of Vitriol

• Green Vitriol

• Blue Vitriol

Which of the following is the correct way of combining water and acid?

• Always add acid to water

• Always add water to acid

• Never combine water and acid

Which of the following stains the skin gray or black?

• Silver nitrate

• Boric acid

• Zinc oxide

• Ammonium thiocyanate