IGCSE Chemistry Extended 7.2.1—Classify oxides as acidic Topic Practice

Iron ore contains iron(III) oxide, $\mathrm{Fe}_{2} \mathrm{O}_{3}$. A blast furnace is used to extract iron from $\mathrm{Fe}_{2} \mathrm{O}_{3}$.
Equations for some of the reactions in the blast furnace are shown.

Explain why the reaction in equation 3 can be described as an acid-base reaction.

A list of substances is shown.
> barium nitrate carbon monoxide hydrated cobalt(II) chloride copper(II) oxide anhydrous copper(II) sulfate ethane potassium iodide propene sodium bromide sulfur dioxide zinc oxide

Answer the following questions using only the substances from the list. Each substance may be used once, more than once or not at all.

Give the name of the substance that:

is an acidic oxide

Period 3 of the Periodic Table is shown.

Answer the following questions using only these elements.
Each element may be used once, more than once or not at all.
State which element:

forms a basic oxide with a formula of the form $\mathrm{X}_{2} \mathrm{O}$

The names of the elements of Period 2 of the Periodic Table are shown.
lithium beryllium boron carbon nitrogen oxygen fluorine neon Answer the following questions about these elements. Each element may be used once, more than once or not at all.

Identify the element which:

forms a basic oxide with the formula $\mathrm{X}_{2} \mathrm{O}$

Some oxides of some elements are listed.

Answer the following questions using only oxides from the list. Each oxide may be used once, more than once or not at all.

Give the formula of an oxide

which is neutral.

Flerovium, Fl, atomic number 114, was first made in research laboratories in 1998.

Only a relatively small number of atoms of flerovium have been made in the laboratory and the properties of flerovium have not yet been investigated.

It has been suggested that flerovium is a typical metal.

Suggest one chemical property of flerovium oxide.

Calcium hydroxide, $\mathrm{Ca}(\mathrm{OH})_{2}$, is slightly soluble in water.

Calcium hydroxide can be made by the reaction of calcium with water.

Name another substance that reacts with water to form calcium hydroxide.

Some airbags contain silicon(IV) oxide.

When the airbag is used sodium oxide is formed.
Oxides can be classified as acidic, amphoteric, basic or neutral.
Classify each of these oxides:
sodium oxide
silicon(IV) oxide.

Nitrogen(I) oxide, $\mathrm{N}_{2} \mathrm{O}$, nitrogen(II) oxide, NO, and carbon monoxide, CO, are all non-metal oxides.

They do not react with acids or bases.
Which statement is correct?

The positions of elements W, X, Y and Z in the Periodic Table are shown.

Which elements form basic oxides?