
Interpretation:
Toxic substances need to be described.
Concept introduction:
Toxic substances are those which have bad influence on living beings. It can be a gas which creates problem when inhaled. It can be a solid or liquid which has serious side effects if enters in the body.

Answer to Problem 3E
A toxic substance is one type of substance which can be poisonous or can cause serious health problems if consumed.
Explanation of Solution
Many toxic substances have versatile health hazards. For example, many metals are toxic for human body, such as lead, mercury, cadmium, etc. These metals bind with different enzymes and lead to serious health problems by interfering with the normal biochemical reactions inside the body.
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