Four substances, W\text{W}W, X\text{X}X, Y\text{Y}Y, and Z\text{Z}Z, are classified by their structure and the presence of delocalised electrons:
Which of the following sets of substances correctly identifies W\text{W}W, X\text{X}X, Y\text{Y}Y, and Z\text{Z}Z?
W=Magnesium\text{W} = \text{Magnesium}W=Magnesium, X=Graphene\text{X} = \text{Graphene}X=Graphene, Y=Benzoic acid\text{Y} = \text{Benzoic acid}Y=Benzoic acid, Z=Poly(ethene)\text{Z} = \text{Poly(ethene)}Z=Poly(ethene)
W=Magnesium\text{W} = \text{Magnesium}W=Magnesium, X=Silicon dioxide\text{X} = \text{Silicon dioxide}X=Silicon dioxide, Y=Buckminsterfullerene (C60)\text{Y} = \text{Buckminsterfullerene } (\text{C}_{60})Y=Buckminsterfullerene (C60), Z=Poly(phenylethene)\text{Z} = \text{Poly(phenylethene)}Z=Poly(phenylethene)
W=Potassium\text{W} = \text{Potassium}W=Potassium, X=Graphene\text{X} = \text{Graphene}X=Graphene, Y=Poly(ethene)\text{Y} = \text{Poly(ethene)}Y=Poly(ethene), Z=Benzoic acid\text{Z} = \text{Benzoic acid}Z=Benzoic acid
W=Potassium\text{W} = \text{Potassium}W=Potassium, X=Graphite\text{X} = \text{Graphite}X=Graphite, Y=Buckminsterfullerene (C60)\text{Y} = \text{Buckminsterfullerene } (\text{C}_{60})Y=Buckminsterfullerene (C60), Z=Poly(phenylethene)\text{Z} = \text{Poly(phenylethene)}Z=Poly(phenylethene)
54 exam-style questions on AQA A Level Chemistry Bonding, covering Ionic bonding, Nature of covalent and dative covalent bonds, Metallic bonding, Bonding and physical properties, Shapes of simple molecules and ions, Bond polarity, and Forces between molecules. Each one has a worked solution and a mark scheme showing where the marks go.