The high temperature resistance property of $Neoprene$ is due to the presence of a large number of which atom?

Draw the electron dot structure of ethane,$C_{2}H_{6}$.

What is a functional group? Give examples of four different functional groups.

State whether the following statement is true or false:
Heating ethanol at $443 \,K$ with excess concentrated sulphuric acid results in the dehydration of ethanol to give ethene.

Why are homologous series of carbon compounds so called? Write the chemical formula of two consecutive members of a homologous series and state the part of these compounds that determines their $(i)$ physical properties,and (ii) chemical properties.

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.