Question

PLEASEEEE HEELLPPPPPP!!!! Electrolysis uses electrical current to break water molecules into oxygen gas and hydrogen gas. How do you know that this is a chemical change? A)Chemical bonds in the water molecule are broken. B)There is a phase change from liquid to gas. C)Electrical current always causes a chemical change. D) It is a single replacement reaction.

Answer 1

The answer is A) Chemical bonds in the water molecule are broken.

Step-by-step explanation:

A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.

A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.

As we know, water is made of hydrogen and oxygen. Thus, if an electric current is applied, it breaks the compound down to its individual elements. This is a chemical change.

I hope I helped, please correct me if I'm wrong!