C_nH_2n

C_nH_2n+2

C_nH_2n-2

C_nH_n

Alkenes

Alkanes

Alkynes

Arenes

${\rm{C}}{{\rm{l}}_2}$

${\rm{B}}{{\rm{r}}_2}$

${{\rm{I}}_2}$

All are equal

${\rm{C}}{{\rm{H}}_3}{\rm{COONa}} + {\rm{BaO}}$

$HCOONa + NaOH$

${\rm{C}}{{\rm{H}}_3}{\rm{COONa}} + {\rm{Sodalime}}$

$Electrolysis{\rm{ }}\;of\;{\rm{ }}HCOONa(aq.)$

Liquefied Petroleum Gas (LPG)

Compressed Natural Gas (CNG)

Piped Natural Gas (PNG)

Biogas

CH₄

C₂H₆

C₃H₈

C₄H₁₀

The freezing point decreases

The boiling point decreases

The boiling point increases

The vapour density decreases

Ethane

Propane

Butane

Pentane

Eclipsed

Staggered

Gauche

Anti

${C_2}{H_4}$ and ${H_2}$

${C_2}{H_4},{H_2}$ and $C{H_4}$

${H_2}$ and $C{H_4}$

$C{H_4}$

Alkanes from ${\rm{C}}{{\rm{H}}_4}\;to\;{{\rm{C}}_4}{{\rm{H}}_{10}}$ are colourless odourless gases

Alkanes from ${{\rm{C}}_5}{{\rm{H}}_{12}}\;to\;{{\rm{C}}_{17}}{{\rm{H}}_{36}}$ are colourless liquids

All alkanes are lighter than water

Melting point of alkanes increases with increase in the number of carbon atoms