Chemistry
The molecules of alkene family are represented by a general formula CnH2n.
Answer the following:
(a) What do n and 2n signify?
(b) What is the name of alkene when n=4?
(c) What is the molecular formula of alkene when n=4?
(d) What is the molecular formula of the alkene if there are ten H atoms in it?
(e) What is the structural formula of the third member of the alkene family?
(f) Write the molecular formula of lower and higher homologous of an alkene which contains four carbon atoms.
Organic Chemistry
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Answer
(a) n is the number of carbon atoms in the molecule and 2n is the number of hydrogen atoms.
(b) Butene
(c) When n=4 then no. of carbon atoms is n=4 and hydrogen atoms is 2n=8, hence alkene is C4H8
(d) When 2n=10 then no. of carbon atoms is n=5 and hydrogen atoms is 2n=10, hence alkene is C5H10
(e) Third member of the alkene family is Butene. Its structural formula is shown below:
(f) Lower homologous: C3H6
Higher homologues : C5H10
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Related Questions
Using appropriate catalysts, ethane can be oxidised to an alcohol, an aldehyde and an acid. Name the alcohol, aldehyde and acid formed when ethane is oxidised.
Write:
(a) molecular formula
(b) electron dot formula and
(c) structural formula of ethene (ethylene).
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Draw the structures of isomers of butene and write their IUPAC names.