Question

One type of cold remedy is an effervescent tablet that breaks down in water. When the tablet is placed in water, it forms gas bubbles. In this example, the formation of a gas
A is a physical property.
B occurs when adding water to acid.
Cis a sign of a chemical change.
D occurs when the water boils.

Answer 1

Answer:

is a sign of a chemical change

Explanation:

The tablet reacts with the water to form carbon dioxide

Answer 2

I think it’s C is a sign of a chemical change.