Which of the following is the use of acetic acid?

The heteroatoms present in $CH_{3}-CH_{2}-O-CH_{2}-CH_{2}Cl$ are:
$(i)$ oxygen
$(ii)$ carbon
$(iii)$ hydrogen
$(iv)$ chlorine

Which of the following is the use of propanone?

Which of the following is the correct representation of the electron dot structure of nitrogen $(N_2)$?

Write the name and structure of an alcohol with three carbon atoms in its molecule.

Both soap and detergent are some type of salts. What is the difference between them? Describe in brief the cleansing action of soap. Why do soaps not form lather in hard water? List two problems that arise due to the use of detergents instead of soaps.