While cooking, if the bottom of the vessel is getting blackened on the outside, it means that:

• the food is not cooked completely
•  the fuel is not burning completely
• the fuel is wet
•  the fuel is burning completely.

Explain the nature of the covalent bond using the bond formation in CH₃Cl.

Draw the electron dot structures for:
(a)    ethanoic acid
(b)    H₂S
(c)    propanone
(d)F2’