Question 7 You have now studied eleven major organic reaction families. 1) Acid base reactions 2) Electrophile/nucleophile addition to alkenes 3) Electrophilic aromatic substitution reactions 4) Nucleophilic substitution reactions 5) Elimination reactions 6) Oxidation 7) Substitution at an acyl group 8) Aldol condensation 9) Claisen condensation 10) Imine formation 11) Imine hydrolysis Identify the reaction family for each of the following:

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.