Question

Q18- Which one of the given processes involves chemical reactions?

A) Storing of oxygen gas under pressure in a gas cylinder

B) Keeping petrol in a China dish in the open

C) Liquefaction of air

D) Heating copper wire in the presence of air at high temperature

Answer 1

Answer:

D is the correct answer

Explanation:

When we burn copper in the presence of air . it will react with Oxygen and form CopperOxide.

So, d) is the correct answer.

but the option are showing change in state. which is a Physical Change.

Answer 2

Answer:

D is the correct answer mark this answer as brainliest i need your support please