Question

Black and white placards indicate the material is

Answer 1

Black and white placards indicate the material is corrosive

Step-by-step explanation:

Corrosive substances are defined as materials that can attack and destroy, by chemical action, living tissue, organic compounds and metal. Recognised as Class 8 Corrosive Substances, they have the ability to cause severe damage to people, property and the environment.

Answer 2

Black and white placards in a chemistry context may indicate properties or hazards associated with materials, such as the texture, color, and risks related to chemicals or substances like fine-grained ash, light-colored frothy substances, or dark-colored glass materials.

Step-by-step explanation:

Black and white placards or labels could indicate a variety of things depending on the context, such as hazards, the physical state of a material, or the characteristics of a substance. For instance, they might be used for hazard communication in labs or industries to signal the presence of dangerous materials such as fine-grained ash, frothy light-colored substances, or dark-colored, glassy materials. Additionally, in the context of art and materials like enamel colored glass, black and white can represent the intensity or opacity of the pigments used. Such labeling is crucial to safely conducting experiments or when creating art pieces using potentially hazardous materials.