The letters A to H in the table below represent eight organic compounds.

2.1 Define the term unsaturated compound. (2)
2.2 Write down the:
2.2.1 Letter that represents an UNSATURATED compound (1)
2.2.2 NAME of the functional group of compound C (1)
2.2.3 Letter that represents a CHAIN ISOMER of compound C (2)
2.2.4 IUPAC name of compound G (3)
2.2.5 General formula of the homologous series to which compound E belongs (1)
2.3 Define the term functional isomers. (2)
2.4 For compound A, write down the:
2.4.1 Homologous series to which it belongs (1)
2.4.2 STRUCTURAL FORMULA of its FUNCTIONAL isomer (2)
2.5 Compound D undergoes a dehydration reaction. Write down the:
2.5.1 IUPAC name of compound D (1)
2.5.2 Letter that represents a product of this reaction (1)
2.5.3 NAME or FORMULA of the inorganic reactant that is used in this reaction (1)
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