Blog

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.       

1.22  Water for human use is treated by filtration then chlorination. Which uses do not need water of this quality?   1 water for cooling in industry 2 water for flushing toilets in the home 3 water for drinking   (1)

1.13 Aqueous potassium iodide is added to aqueous silver nitrate. What are the colours of the final precipitate and solution? (1)

1.39 Which physical property is used to separate the nitrogen and oxygen from air? (1)

1.11 The diagram shows the reaction between zinc oxide and dilute hydrochloric acid. (1)   Right-click on the button to open the data booklet in a new tab.        Which terms describe the reaction?   Endothermic Neutralization A Yes Yes B Yes No C No Yes D No No

1.20  Many metals are extracted from their ores by heating the metal oxide with carbon. Which metal cannot be extracted using this method? (1)  

1.26  A covalent molecule M contains four shared pairs of electrons. What is M?   A hydrogen chloride, HCl B methane, CH4 C ammonia, NH3 D water, H2O   (1)  

1.5 The table contains information about four substances. (1)     Melting point in degree Celsius Electrical conductivity     When molten In aqueous solution A 13 No Yes B 99 Yes Yes C 790 Yes Yes D 1500 No insoluble   Which substance is Potassium Chloride?