Question

Which of the following is a chemical change ?
a. water is boiled on a stove
b. gasoline combusts in an engine
C. copper metal stretched into a long wire
d. salt is dissolved in water​

Answer 1

Answer:

salt dissolve in water bhai

Answer 2

Answer:

b. gasoline combusts in an engine.

Explanation:

becausebecause a is equal to water is boiled onstop with physical change and c is equal to copper metal stretched into a long wire which changes its physical property salt is dissolved in water which is also change in physical property because salt can be separated from water again copper metal can be taken into the shape which was it before and water can be cool down also what gasoline once combust in an engine cannot come into its before situation