Cyclohexa-$1,3$-diene contains . . . . . . vinylic and . . . . . . allylic hydrogen atoms?

Explain the three-dimensional $(3-D)$ representation of organic molecules and provide examples.

The enolic form of acetone contains ................

An organic compound $C_3H_6O$ does not give a precipitate with $2,4-$Dinitrophenylhydrazine reagent and does not react with metallic sodium. The compound is:

State whether the following statements are True or False:
$(i)$ There is a huge number of organic compounds because the carbon atom is very small.
$(ii)$ The number of organic compounds is huge because of catenation.
$(iii)$ Organic compounds are in a huge number because of valency.

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.