How many functional groups are present in the following molecule?

State True or False for the following statements:
$(i)$ Organic compound was first synthesized by $F$. Wohler.
$(ii)$ Berzelius stated that some mysterious force exists in living organisms.
$(iii)$ In $1828$,Wohler prepared an organic compound from an inorganic compound,at which time the vital force theory was accepted.
$(iv)$ Kolbe prepared acetic acid and Berthelot prepared methane.

Which of the following statements is $NOT$ true about a homologous series?

The correctly matched pairs of the following are given by the sets $:$
$(A)$ Neopentane $-$ position isomer of isopentane
$(B)$ Isopentane $-$ three primary carbon atoms
$(C)$ Isobutylene $-$ no secondary carbon
$(D)$ Isobutane $-$ two primary carbons

The number of secondary carbon atoms present in the following compounds are respectively:

Glycerol is not used in which of the following cases?