Structural Isomers

Structural isomers have

• same molecular formula and same structural formula

• different molecular formula and same structural formula

• different molecular formula and different structural formula

• same molecular formula but different structural formula

Which statement best defines chain isomerism?

• Existance of chemical compounds with different functional group

• Same structural formula that has different location of substituent group

• Different ways the same number of carbons are connected which is either straight or branched

• Same functional group but in a different position.

What is positional isomerism?

• Two different functional groups in the same position.

• The same molecular formula but a different chain length.

• Functional group is different but has the same molecular formula.

• Same functional group and a different position.

What is functional group isomerism?

• Two different functional groups but a longer chain.

• The same molecular formula but a different chain length.

• Functional group is different but has the same molecular formula.

• Same functional group and a different position.

Which formulas represent butane or its isomer?

(1) CH3(CH2)2CH3

(2) CH3CH(CH3)CH3

(3) (CH3)3CH

• 1 and 2 only

• 1 and 3 only

• 2 and 3 only

• 1 , 2 and 3

Molecules of 1-bromopropane and 2-bromopropane differ in

• molecular formula

• structural formula

• number of carbon atoms per molecule

• number of bromine atoms per molecule

Which structural formula represents an isomer?

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A structural isomer of pentane is?

• 2-methyl butane

• 2,2-dimethyl octane

• 1-methyl propane

• 1-methyl pentane

Given the structural formulas below, which 2 formulas represent compounds that are isomers of each other?

• A and B
• A and C
• B and D
• C and D

Which structural formula represents a molecule that is not an isomer of pentane?

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