i. Organic chemistry :
It deals with properties and reactions of compounds of carbon.
ii. Inorganic chemistry :
It deals with the study of all the compounds which are not organic.
iii. Physical chemistry...
(a) Ratio of neutrons to protons is 2.3: 1 which is not the stable ratio of 1:1
(b) Age of fossils can be estimated by C-14 decay. All living organisms have...