FORM 3 CHAPTER 4

In a less vigorous reaction between a less reactive metal such as iron and oxygen , only a glow or slow change in colour is observed

• True

• False

Magnesium + Oxygen = X

What is X ?

• Magnesium dioxide

• Magnesium oxide

• Magnesium (IV) oxide

• Magnesium trioxide

What are the two non-metal elements that are included in the reactivity series of metals ?

• Calcium

• Carbon

• Sodium

• Hydrogen

What is the common name of iron (III) oxide ?

• Pyrite

• Cassiterite

• Hematite

• Bauxite

This chemical compound has a scientific name of silicon dioxide. What is the common name of this chemical name described ?

• Quartz

• Jade

• Gold

• Marble

The most reactive metal in the reactivity series of metals is ..

p/s : capslock ( huruf besar semua )

What is meant by mineral ?

• solid material whose constituents such as atoms , molecules or ions

• a thing that is composed of two or more separate elements : a mixture

• solid elements or compounds present naturally with definite crystalline structures and chemical compositions

• substances that cannot be chemically interconverted or broken down into simpler substances

Reactivity of metals towards oxygen increases when the arrow are going down .

• True

• False

Figure above shows a Bauxite. What are the elements that is combined in the Bauxite ?

• Silicon and Oxygen

• Aluminium and Carbon

• Iron and Sulphur

• Aluminium and Oxygen

In a vigorous reaction between a more reactive metal such as magnesium and oxygen , a bright flame is observed

• True

• False