What are homologous series of carbon compounds ? Write the molecular formula of two consecuative members of homologous series of aldehydes. State which part of these compounds determines their (i) physical and (ii) chemical properties.

What are homologous series of carbon compounds ? Write the molecular f

1.	What are homologous series of carbon compounds ? Write the molecular formula of two consecuative members of homologous series of aldehydes. State which part of these compounds determines their (i) physical and (ii) chemical properties.
Answer» Homologous series. A series of carbon compounds in which the same functional group substitutes for hydrogen on a carbon chain is called a homologous series. There is a difference of `-CH_(2)` in the molecular formulae of two nearest compounds of a homologous series. Each such series has same general molecular formula and has a general scientific name. There is a difference of `14 mu` ( unified mass) in the molecular masses of two nearest compounds of a series. Members of homologous seris of aldehydes `:` H - CHO Methanal `CH_(3) - CHO` Ethanal `C_(2)H_(5) -CHO` Propanal (i) The carbon-chain attached to aldehyde group , i.e., `( H-, CH_(3)- , C_(2)H_(5))` determine the physical properties. (ii) The functional group attached to all aldehydes ( -CHO) determines the chemical properties.

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What are homologous series of carbon compounds ? Write the molecular formula of two consecuative members of homologous series of aldehydes. State which part of these compounds determines their (i) physical and (ii) chemical properties.

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