Question 4
Question 4 of 40
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Periodic Table
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Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
6. Chemical reactions
6.2. Rate of reaction

Describe collision theory in terms of: (a) number of particles per unit volume (b) frequency of collisions between particles (c) kinetic energy of particles (d) activation energy, E_a

1. States of matter
1.1. Solids, liquids and gases

Describe and explain changes of state (melting, boiling, evaporating, freezing and condensing) in terms of kinetic particle theory

5. Chemical energetics
5.1. Exothermic and endothermic rea...

Define activation energy, E_a, as the minimum energy that colliding particles must have to react