Question

A chemical process in which a substance reacts with (a) _________ to give off heat is called (b)______. The substance is said to be (c) __________.Sometimes (d) _____is also given off during this process, either as a flame or as a glow.​

Answer 1

Answer:

a) another substance/ oxygen

b) combustion reaction

c) Fuel

d) light energy

Explanation:

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Answer 2

A chemical process in which a substance reacts with oxygen to give off heat is combustion.

For example, when C is burnt in excess air, it gives carbon dioxide and heat.