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What are homologous series of carbon compounds? Write the molecular formula of two consecutive members of homologous series of aldehydes. State which part

of these compounds determines their (i) physical and (ii) chemical properties.


A homologous series may be defined as a family of organic compounds having the same functional group,and the successive(adjacent) members of which differ by a CH _{2} unit or 14 mass units.

Two consecutive members of homologous series of Aldehydes: CH _{3} CHO and C _{2} H _{5} CHO.

A carbon compound is made up of two parts: R-F,where R is the hydrocarbon part and F is the functional group part.
So,this R (hydrocarbon) part determines the physical properties of a compound and the  F (functional group) part determines the chemical properties of the compound.  
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