Question

1. choose the best answer.

the yellow substance in the test tube shown is called a(n) ______.
image of laboratory glassware with a beaker containing a yellow solid
options: precipitate, spectator, dissociate, reactant

Explanation:

In a chemical reaction (related to Chemistry, a subfield of Natural Science), a precipitate is a solid substance that forms and settles out of a liquid mixture. The yellow substance in the test tube appears as a solid forming in a liquid, so it's a precipitate. "Spectator" refers to ions not involved in reaction, "dissociate" is a process, and "reactant" is a starting substance, not the formed solid here.

Answer:

A. precipitate