CAIE IGCSE Chemistry 8 The Periodic Table Topic Practice

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Covered syllabus points

8.1 Arrangement of elements8.2 Group I properties8.3 Group VII properties8.4 Transition elements8.5 Noble gases

Question 1

[Maximum number: 1]

Which statement about the Periodic Table is correct?

A

Elements in the same group have the same number of electron shells.

B

It contains elements arranged in order of increasing proton number.

C

Metals are on the right and non-metals are on the left.

D

The most reactive elements are at the bottom of every group.

Question 2

[Maximum number: 1]

Lithium and potassium are metals in Group I of the Periodic Table.
Lithium has a melting point of 181∘C181^{\circ} \mathrm{C} and a density of 0.53 g/cm30.53 \mathrm{~g} / \mathrm{cm}^{3}.
Which row describes the melting point and density of potassium?

melting point in ∘C{ }^{\circ} \mathrm{C}

density in g/cm3\mathrm{g} / \mathrm{cm}^{3}

less than 181

less than 0.53

less than 181

greater than 0.53

greater than 181

less than 0.53

greater than 181

greater than 0.53

Question 3

[Maximum number: 1]

Which row describes the structure of Group VII elements and the trend in their reactivity down the group?

structure

reactivity down

Group VII

diatomic

increases

diatomic

decreases

monatomic

increases

monatomic

decreases

Question 4

[Maximum number: 1]

Hydrogen iodide thermally decomposes into iodine and hydrogen. The reaction is reversible.

2HI( g) colourless gas →⇌I2( g) purple gas +H2( g) colourless gas \underset{\text { colourless gas }}{2 \mathrm{HI}(\mathrm{~g})} \rightarrow \underset{\substack{\mathrm{I}_{2}(\mathrm{~g}) \\ \text { purple gas }}}{\rightleftharpoons}+\underset{\substack{\mathrm{H}_{2}(\mathrm{~g}) \\ \text { colourless gas }}}{ }

Fig. 4.1 shows a gas syringe containing a mixture of hydrogen iodide, iodine and hydrogen gases. The gas syringe is sealed and the mixture is heated to 300∘C300^{\circ} \mathrm{C}. The mixture of gases reaches equilibrium and is purple.

Fig. 4.1

Fig. 4.1

Methanol is manufactured by reacting carbon monoxide with hydrogen.

CO( g)+2H2( g)⇌CH3OH( g)\mathrm{CO}(\mathrm{~g})+2 \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons \mathrm{CH}_{3} \mathrm{OH}(\mathrm{~g})

The rate of formation of methanol increases when a catalyst is used.

Choose from the list the element that is most likely to be used as the catalyst.

Draw a circle around your chosen answer.
calcium carbon copper sodium sulfur

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