Exploring Alkanes Nomenclature

What is the general formula for alkanes?

• CnH2n

• CnH(2n+2)

• C(n-1)H(2n+1)

• CnH(2n-2)

How do you name a straight-chain alkane with 5 carbon atoms?

• propane

• hexane

• pentane

• butane

What prefix is used for a 3-carbon alkane?

• but

• eth

• prop

• pent

What is the IUPAC name for C7H16?

• hexane

• octane

• pentane

• heptane

How do you identify the longest carbon chain in a branched alkane?

• Count the total number of carbon atoms in the molecule.

• Identify the carbon atoms with the most hydrogen atoms attached.

• Select the carbon atom with the highest atomic number.

• Identify the longest continuous chain of carbon atoms.

What suffix is used in the nomenclature of alkanes?

• -yne

• -ene

• -ol

• -ane

How do you name an alkane with a cycloalkane structure?

• Cycloalkanes are named by using the prefix 'cyclo-' only for even-numbered carbon rings.

• Cycloalkane names are formed by adding 'cyclo-' to the alkane name corresponding to the number of carbons in the ring.

• Alkane names are formed by adding 'alkane' to the cycloalkane structure.

• Cycloalkanes are named by removing 'cyclo-' from the alkane name.

What is the correct name for CH3-CH2-CH(CH3)-CH2-CH3?

• 3-methylpentane

• 4-methylpentane

• 2-methylpentane

• 3-ethylbutane

How do you indicate the position of a substituent in an alkane name?

• Use a letter to indicate the substituent position.

• Indicate the position by the length of the carbon chain.

• Use a number before the substituent name to indicate its position.

• List the substituents alphabetically without numbers.

What is the IUPAC name for an alkane with two methyl groups on the second carbon?

• 2,3-dimethylhexane

• 2,2-dimethylpentane

• 3,3-dimethylbutane

• 2-methylpentane