A Level H2 Chemistry 2009 Paper 3 Answers !!top!! [RELIABLE - 2027]

[ RCONH_2 \xrightarrow{LiAlH_4} RCH_2NH_2 ] Mechanism not required in full for 2 marks – just state: " Hydride attack, elimination of water, then another hydride attack ".

Remember that 2,4-DNPH yields an orange precipitate with carbonyl compounds, while Fehling’s solution or Tollens' reagent distinguishes between aldehydes and ketones. 4. Transition Elements and Complex Ions a level h2 chemistry 2009 paper 3 answers

Answer: The Group 1 and Group 2 elements exhibit different properties due to their electronic configurations. Group 2 elements have higher melting points than Group 1 elements because they have a more stable electronic configuration, which results in stronger interatomic forces. elimination of water