Author: Anonymous

1.34 Which is a chemical change? (1)

 1.40 Four different food colourings are analysed using chromatography. The results are shown on the chromatogram. The diagram is not drawn to scale. Which food colouring contains a component with an Rf value of 0.3? (1)   Right-click on the button to open the data booklet in a new tab.       

1.36 Which pair of elements reacts together most violently? (1)

1.24 The diagram shows a cup of hot tea. (1)   Right-click on the button to open the data booklet in a new tab.        Which row describes the water particles in the air above the cup compared with the water particles in the cup?   Moving faster Closer together A Yes No B Yes Yes C No No D No Yes

1.14 Three gas jars contain carbon dioxide, hydrogen, and oxygen. Which one of the following tests could be used to discover which gas is in each jar? (1)

1.31 Which statement describes the structure of copper? (1)  

1.17 Which properties of the element titanium, Ti, can be predicted from its position in the Periodic Table? (1)       can be used as a catalyst   conducts electricity when solid has low density   forms coloured compounds   A Yes Yes No Yes B Yes Yes Yes No C Yes No Yes Yes D No Yes Yes Yes    

1.9 The rates of some chemical reactions can be measured by using the apparatus shown. (1)   Right-click on the button to open the data booklet in a new tab.        For which reaction is this apparatus suitable?   Right-click on the button to open the data booklet in a new tab.        

1.21  A metal has the following properties.   ● It does not react with cold water. ● It reacts with dilute hydrochloric acid. ● It cannot be extracted from its oxide using carbon. Between which two metals in the reactivity series should it be placed?   (1)

 1.33 What are the ionic half-equations for the electrode reactions during the electrolysis of concentrated aqueous sodium chloride?   (1)   Right-click on the button to open the data booklet in a new tab.