Which is the functional group in propanone?

Write true or false for the following statement:
Like mineral acids,ethanoic acid reacts with a base such as sodium hydroxide to give salt (sodium ethanoate or sodium acetate) and water.

The structural formula of an ester is shown in the image. Write the structural formula of the acid and the alcohol from which it might be prepared. Name the process of formation of ester.

Which monomer is present in bakelite?

The structural formula of ethyne is:

An atom of an element contains six electrons in its valence shell. This element is the second major component of air. It exists as a diatomic molecule.
$(i)$ Identify the element.
$(ii)$ Show the bond formed between two atoms of this element.
$(iii)$ Write the nature of the bond between the two atoms.