What will be the formula and electron dot structure of cyclopentane ?

What would be the electron dot structure of carbon dioxide which has the formula $CO _{2}$ ?

Give a test that can be used to differentiate between saturated and unsaturated hydrocarbons.

Explain the nature of the covalent bond using the bond formation in $CH_3Cl$.

Explain the formation of scum when hard water is treated with soap.

How would you name the following compounds ?

$(i)$ $CH _{3}- CH _{2}- Br$

$(ii)$ $\begin{matrix}
   H  \\
   |  \\
   H-C=O  \\
\end{matrix}$

$(iii)$ $\begin{matrix}
   \begin{matrix}
   H\,\,\,\,\,H\,\,\,\,\,\,\,H\,\,\,\,\,H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \,\, \\
   |\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}  \\
   H-C-C-C-C-C\equiv C-H  \\
   \,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   H\,\,\,\,\,\,\,H\,\,\,\,\,\,\,H\,\,\,\,\,H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
\end{matrix}$