Identify and name the functional groups present in the following compounds:
$(a)$ $CH_3-CH_2-CH_2-OH$
$(b)$ $CH_3-CH_2-COOH$

Butanone is a four-carbon compound with the functional group:

Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of

Which substance is obtained by the reduction of methanal?

$A$ gas is evolved when ethanol reacts with sodium. Name the gas evolved and also write the balanced chemical equation of the reaction involved.

In electron dot structure,the valence shell electrons are represented by crosses or dots.
$(a)$ The atomic number of chlorine is $17$. Write its electronic configuration.
$(b)$ Draw the electron dot structure of chlorine molecule $(Cl_2)$.