Chemistry-Exam Revision-2
❖ Properties of compound:
1. A Compound is made up of different element combined in a fixed ratio by mass
2. The properties of compound are different from its constituent elements
3. A compound is formed by the chemical reaction between two elements
❖ what are the factors that can affect solubility?
1. nature of solute
2. nature of solvent
3. temperature
❖ Difference between solid liquid and gases
❖ What occurs to matter during expansion?
When matter is heated, the particles gain energy and vibrate more vigorously.
The particles move Slightly further apart from one another, This causes the
volume of matter increase and the process is called expansion.
❖ What occurs to matter during Contraction?
When matter is cooled, the particles lose energy and vibrate less
vigorously. The particles move closer to one another. This causes the
volume to decrease and the process is called Contraction.
Chemistry-Exam Revision-1
❖ Determine whether each diagram represents a pure substance or a mixture. If it
represents a pure substance, classify the substance as an element or a compound
❖ Explain the changes occurred after heating the iron ball
❖ Revise Brownian motion from chap-7