CIE iGCSE Co-Ordinated Science C5.1 Exothermic and endothermic reactions Exam Style Questions Paper 2
Question
What describes an endothermic reaction?
(A) a reaction in which all the bonds in all the reactants are broken
(B) a reaction in which energy is released to the surroundings
(C) a reaction which goes to completion
(D) a reaction in which energy is taken in from the surroundings
▶️Answer/Explanation
Ans: D
Question
Which energy level diagram shows the activation energy for an exothermic reaction?
▶️Answer/Explanation
Ans : C
Question
When a match burns, heat and light energy are produced.
Which row describes the type of change and the type of reaction taking place?
▶️Answer/Explanation
Ans: B
Question
The energy level diagram for a reaction is shown.
The diagram represents an ……1…… reaction. Heat is ……2…… during this reaction.
Which words complete gaps 1 and 2?
▶️Answer/Explanation
Ans: B