Tests Review

Question 1

Chemical properties (4)

Answer 1

Reactivity with oxygen
Reactivity with acids
Reaction to heat
Combustibility

Question 2

Indicators of chemical change(5)

Answer 2

Light is produced
Colour change
Formation of gas
Change in temperature
Precipitation formation

Question 3

Properties of a physical change(15)

Answer 3

Colour, lustre, state, odour, texture, ductile, malleable, viscosity, conductivity, melting point, boiling point, freezing point, hardness, solubility.

Question 4

Indicators of a physical change(3)

Answer 4

Change of state
Change in shape/form
Dissolving

Question 5

Physical vs chemical change

Answer 5

Physical change is a change that does not alter the composition of matter. A chemical change is when the substances change into one or more new substances with different properties.

Question 6

Law of conversion of mass

Answer 6

The total mass of the reactants is always equal to the total mass of the product.

Question 7

Synthesis reaction

Answer 7

The combination of smaller molecules into larger molecules
A+B=AB

Question 8

Décomposition réaction

Answer 8

The splitting of a large molecule into a smaller molecule.
AB= A+B