Name the functional group present in each of the following organic compounds:1

(i) CH₃COCH₃ (ii) C₂H₅COOH

Define homologous series of organic compounds list its two characteristics. Write the name and formula of the first member of the series of alkenes. 3

State and describe in brief any three main factors responsible for the rise of a new species.

Which phenomenon is responsible for making the path of light visible?

Which class of carbon compounds is responsible for the depletion of ozone layer at the higher level of the atmosphere?