Organic Chemistry Qs

Question 1

CH3CHOHCH3

Answer 1

Propanol

Question 2

CH3COCH3

Answer 2

Propanone

Question 3

CH3COCH3–>CH3COCHOHCH3

Identify bonds broken and formed

Answer 3

Broken C to O

Formed OH +CH

Question 4

A= propene
B=propanol
C=propanone
Boiling points are -48, 56 and 82
Identify boiling points

Answer 4

Propene= -48 van see waals forces
Propanol= 82 hydrogen bonds
Propanone=dipole dipole forces

Question 5

Benzene

Answer 5

3 double bonds has two pi electors
Electrons in benzene ring are delocalised
All carbon carbon bonds in benzene are if same length

Question 6

Free radical substitution-ethane

Explain how the occupancy if another hydrocarbon in product provides evidence

Answer 6

Traces of butane

Question 7

Explain why propanone has a lower boiling point than butane

Answer 7

Fewer electrons

Fewer intermolecular forces between bonds

Question 8

Isomers pairs

Answer 8

Propan1ol and propan2ol

Aldehydes and ketones

Question 9

Account for greater reactivity of alkenes compared to alkanes

Answer 9

Presence of double bond

Electron rich

Question 10

Describing bonding in benzene

Answer 10

6 signs bonds

From c-H formed from 6 P orbitals

Question 11

Type of reaction in relux

Answer 11

Saponification

Question 12

Two features of an elimination reaction

Answer 12

-H2O

Change to unsaturated

Question 13

Benzene

Answer 13

All carbon to carbon bonds in benzene are identical

Bonds intermediate between single and double

Question 14

Give two reasons alcohols have higher boiling point that corresponding alkane

Answer 14

Higher MR

Hydrogen bonds of H-O