Unit 8 Science Quiz

Which of the following option below is chemical change

• burning a piece of wood

• melting chocolate

• heating glass and bending it

• baking a cake

Magnesium reacts with oxygen

• magnesium sulfide

• magnesium dioxide

• magnesium oxide

• magnesium chloride

Which of the following below is about physical change

• cooking an egg

• baking a cake

• heating glass and bending it

• freezing the water

Sodium hydroxide reacts with hydrochloric acid to produce sodium chloride and water

• produces metal oxide

• it is a burning reaction

• it is a neutralisation

• a gas given off

Potassium reacts with water to form potassium hydroxide

• produce metal sulfide

• neutralisation reaction

• produce carbon dioxide

• burning reaction

Copper carbonate reacts to produce copper oxide

• produce metal oxide

• neutralisation reaction

• burning reaction

• precipitate formed

Which of the following options below is Chemical properties. The answer more than 1

• what colour it is

• boiling or melting temperature

• how readily it reacts

• how acidic or alkaline it is

Which of the following statements below is correct?

• the acid was stronger than alkali

• the alkali was stronger than acid

• the acid and the alkali were equal in strenght

The substances that react together in a chemical reaaction

• product

• chemical reaction

• reactant

• neutralisation

Write down 1 concept that you have learned in this unit 8