Question

7. Which of these is not an observation that a chemical change has occurred?

A. The temperature changes
B. A gas is produced (bubbling)
C. The substance is slippery
D. A permanent change in color


PLEASE HELP!!!!

Answer 1

The answer is D.

When the color changes you can’t undo that making it a chemical bond

Answer 2

The answer is C or D

Why i say C is because it only says the substance is slippery, no sign of chemical change

D - the answer “a permanent change in color” has the word “change” in it although it could be permanent color.

The answers most likely C.