What are biochemical catalysts called?

Write three different chemical reactions showing the conversion of ethanoic acid to sodium ethanoate. Write balanced chemical equations in each case. Write the name of the reactants and the products other than ethanoic acid and sodium ethanoate in each case.

$CH_3-CH_2-OH \xrightarrow{\text{Alkaline } KMnO_4 + \text{Heat}} CH_3-COOH$
In the above given reaction,alkaline $KMnO_4$ acts as:

Which type of compound is ethyl acetate?

Define homologous series of organic compounds. Mention any two characteristics of homologous series.

Give names of the following:
$(a)$ An alcohol containing $4$ carbon atoms.
$(b)$ An acid with $5$ carbon atoms.
$(c)$ Simplest ketone. Define functional group in a carbon compound. Mention names of any three functional groups with their formulae and example.