Question

Why we consider some chemical reaction as useless

Answer 1

Answer:

cz. they have on use like iron with h2oand O

results rusting and rusting have no use even spoil iron

Explanation:

chk onces

Answer 2

Chemical reactions help us understand the properties of matter. By studying the way a sample interacts with other matter, we can learn its chemical properties. These properties can be used to identify an unknown specimen or to predict how different types of matter might react with each other.