7. Intro to Organic Chem

Question 1

General formula of an alkane

Answer 1

C n H 2n+2

Question 2

General formula of an alkene

Answer 2

C n H 2n

Question 3

General formula for an alcohol

Answer 3

C n H 2n+1 OH

Question 4

General Formula for a cycloalkane

Answer 4

C n H 2n

Question 5

What is a homologous series?

Answer 5

a family of hydrocarbons with similar chemical properties, that share the same general formula.

Question 6

Name the 3 types of structural isomerism

Answer 6

• chain
• positional
• functional group

Question 7

Name the 2 types of stereoisomerism

Answer 7

• geometric (E/Z)
• optical

Question 8

Definition of structural isomerism

Answer 8

same molecular formula but different structural formulas

Question 9

What difference does chain isomerism cause?

Answer 9

length of C chain

Question 10

What difference does positional isomerism cause?

Answer 10

position of functional group

Question 11

What difference does functional group isomerism cause?

Answer 11

type of functional group

Question 12

Draw the structural isomer of C5H12

Answer 12

pentane, 2-methylbutane, 2,2-dimethylbutane

Question 13

Draw the isomers for C5H10

Answer 13

Question 14

Stereoisomerism definition

Answer 14

same structural formula but different arrangement of atoms in space

Question 15

How do E/Z isomers arise?

Answer 15

• each C atom in the C=C double bond is bonded to 2 diff groups
• there’s a lack of rotation around the C=C double bond

Question 16

Does the molecule have E/Z isomerism?

Answer 16

no

Question 17

Does the molecule have E/Z isomerism?

Answer 17

yes

Question 18

Does the molecule have E/Z isomerism?

Answer 18

no

Question 19

Draw E and Z but-2-ene

Answer 19

Question 20

Name this molecule

Answer 20

3-hydroxy-2-methyl-pent-2-enal