CHEMICAL CHANGES

Question 1

What is a key indicator of a chemical change?

Answer 1

Formation of a new substance

Question 2

True or False: A change in color can indicate a chemical change.

Answer 2

True

Question 3

Fill in the blank: The production of ______ is a common evidence of a chemical change.

Answer 3

gas

Question 4

What evidence might suggest a chemical reaction has occurred when two liquids are mixed?

Answer 4

Formation of a precipitate

Question 5

Which of the following is NOT an evidence of chemical change? A) Color change B) Temperature change C) Change in state D) Formation of gas

Answer 5

C) Change in state

Question 6

What is the significance of a temperature change in a chemical reaction?

Answer 6

It indicates that heat is either absorbed or released.

Question 7

Short Answer: Name one example of a chemical change that occurs in everyday life.

Answer 7

Rusting of iron

Question 8

True or False: The mass of substances is always conserved during a chemical change.

Answer 8

True

Question 9

What term describes the solid that forms when two solutions react?

Answer 9

Precipitate

Question 10

Multiple Choice: Which of the following is an example of a chemical change? A) Melting ice B) Boiling water C) Burning wood D) Dissolving sugar

Answer 10

C) Burning wood