The diagram below shows a molecule of maltose.    

This molecule can be broken into two glucose molecules by a chemical reaction    
(a) (i) What type of reaction would this be    
  (ii) What substance would need to be added for this reaction to proceed    
  (iii) Draw below one of the glucose molecules that would be formed by this reaction    
(b)   Describe how you would perform a test to indicate that a substance contained sucrose and not glucose