A blue placard specifically indicates that a chemical is a _________ hazard.

Contraindications for the administration of nitroglycerin include a patient:

A. Who is 22 years of age. B. Who recently took Viagra. C. Who is suffering from hypertension. D. Who has already taken one dose without relief.

Oxidation of acridinium esters by hydrogen peroxide in the presence of peroxidase produces which of the following?

A. Fluorescence B. Phosphorescence C. Translucence D. Chemiluminescence