IGCSE Coordinated Chemistry Workout 13

Which would be a liquid at 50 °C?

• A

• B

• C

• D

The diagram shows part of the Periodic Table. Which two elements would be the most reactive in their group?

• W and Y

• W and Z

• X and Y

• X and Z

Processes used in the petrochemical industry include

1 cracking,

2 distillation.

For which of these processes is a catalyst used?

• both 1 and 2

• 1 only

• 2 only

• neither 1 nor 2

In the diagram above, the compounds on the left are monomers and those on the right are polymers. Which two arrows link the monomer to the correct polymer?

• 1 and 2

• 1 and 4

• 2 and 3

• 3 and 4

Diamond and silicon(IV) oxide are hard materials. What could be the reason for this?

• They are compounds of non-metallic elements.

• They are naturally occurring materials.

• They have giant structures with covalent bonding.

• They have very high melting points.

The diagram shows a metal being extracted from its powdered ore using carbon. What happens to the ore in this reaction?

• it burns

• it decomposes

• it is oxidised

• it is reduced

An experiment is set up to test the effect of electricity on solution Y. What are the names of W, X and Y?

• W = anode; X = cathode; Y = electrode.

• W = anode; X = cathode; Y = electrolyte.

• W = cathode; X = anode; Y = electrode.

• W = cathode; X = anode; Y = electrolyte.

Using solution X, a student successfully tested for the presence of chloride ions. What is solution X and the result of the test?

• solution X is dilute sulphuric acid and the result is a yellow precipitate

• solution X is dilute sulphuric acid and the result is a white precipitate

• solution X is silver nitrate solution and the result is a yellow precipitate

• solution X is silver nitrate solution and the result is a white precipitate

Which test and result show that a fertiliser contains nitrate ions?

• A

• B

• C

• D

The positions of four elements are shown in part of the Periodic Table. Which elements form a bond by sharing electrons?

• W and X

• W and Y

• X and Y

• Y and Z