Final answer:
The combination of chemicals that are not supposed to combine is referred to as an unintended chemical reaction or a reaction between incompatible substances in chemistry.
Step-by-step explanation:
In chemistry, the combination of chemicals that are not supposed to combine is referred to as an unintended chemical reaction or a reaction between incompatible substances. This can occur when two or more substances come into contact and react, resulting in the formation of new compounds.
For example, mixing an acid and a base can result in a neutralization reaction, which can be potentially dangerous if not done properly. Mixing certain drain cleaners or household chemicals can also produce harmful reactions.
It is important to handle chemicals carefully and follow proper safety precautions to avoid unintended chemical reactions.