Draw the electron dot structure of the following:

${\mathrm{C}}_3{\mathrm{H}}_6$

Draw the electron dot structure of the following:

${\mathrm{C}}_3{\mathrm{H}}_4$

Draw the electron dot structure of the following:

${\mathrm{H}}_2\mathrm{O}$

Draw the electron dot structure of the following:

${\mathrm{N}}_2$

Which hydrocarbons from the following undergoes addition reaction and why?

${\mathrm{C}}_3{\mathrm{H}}_8, {\mathrm{C}}_2{\mathrm{H}}_2, {\mathrm{C}}_2{\mathrm{H}}_6, {\mathrm{C}}_3{\mathrm{H}}_6$

Give the chemical formula and structural formula of:

Benzene 

Give the chemical formula and structural formula of:  

Propanoic acid

Give the chemical formula and structural formula of:

Propanal