Question

which of the following is not an example of real - world applications of chemical reactions?
a. formation of rust on metal
b. melting of ice
c. combustion in a car engine
d. baking bread

Explanation:

A chemical reaction results in the formation of new substances with different chemical properties. Rust formation on metal is a chemical reaction between iron, oxygen, and water. Combustion in a car engine involves fuel reacting with oxygen to produce energy and new substances. Baking bread includes chemical reactions like yeast - induced fermentation. Melting of ice is a physical change (from solid to liquid), not a chemical reaction as the water molecules remain the same chemically.

Answer:

B. Melting of ice