Chemistry

Define the following terms:

(a) Chemical change

(b) Chemical bond

(c) Effervescence

(d) Precipitate

Chemical Reaction

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Answer

(a) A chemical change is a permanent change in which the chemical composition of a substance is changed and one or more new substances with different chemical compositions and different properties are formed.

(b) A chemical bond is the force that holds the atoms of a molecule together, as in a compound.

(c) Effervescence is the formation of gas bubbles in a liquid during a reaction.

(d) Certain chemical reactions are characterized by the formation of insoluble solid substances called precipitate.

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