Forensic chemistry

Question 1

What is Catenation?

Answer 1

The ability to form bonds between atoms of the same element

Question 2

What is the suffix and example of an alkane?

Answer 2

-ane
Ethane

Question 3

What is the suffix and example of an Alkene?

Answer 3

-ene
Ethene

Question 4

What is the suffix and example of an Alkyne?

Answer 4

-yne
Ethyne

Question 5

What is the suffix and example of an Haloalkane?

Answer 5

halo-
Chloroethane

Question 6

What is the suffix and example of an Alcohol?

Answer 6

-ol
Ethanol

Question 7

What is the suffix and example of an Aldehyde?

Answer 7

-al
Ethanal

Question 8

What is the suffix and example of an Ketone?

Answer 8

-one
Ethanone

Question 9

What is the suffix and example of an Carboxylic acid?

Answer 9

-oic acid
Ethanoic acid

Question 10

What is the suffix and example of an Acyl chloride?

Answer 10

-oyl chloride
Ethanoyl chloride

Question 11

What is the suffix and example of an Amide?

Answer 11

-amide
Ethanamide

Question 12

What is the suffix and example of an Ester?

Answer 12

-yl -oate
Methyl ethanoate

Question 13

What is the suffix and example of an Nitrile?

Answer 13

-Nitrile
Ethanenitrile

Question 14

What is the suffix and example of an Amine?

Answer 14

-amine
Methylamine

Question 15

What is the suffix and example of an Nitro?

Answer 15

Nitro -
Nitroethane

Question 16

What is the suffix and example of an Sulphonic acid?

Answer 16

-sulphonic acid
benzene sulphonic acid

Question 17

What is the suffix and example of an Ether?

Answer 17

-oxy -ane
Ethoxyethane

Question 18

What is a free radical?

Answer 18

Reactive species which possess an unpaired electron

Question 19

What are some ways a free radical is formed?

Answer 19

Homolytic fission of covalent bonds
Formed during chlorination
Formed during thermal cracking

Question 20

What are the conditions needed in the Chlorination of Methane?

Answer 20

Uv light
Sunlight

Question 21

What type of reaction is the chlorination of methane?

Answer 21

Free radical substitution

Question 21

What are the bond angles around a C=C bond?

Answer 21

Planar
120

Question 22

What is CIS isomerism?

Answer 22

Groups/atoms are on the same side of the double bond

Question 23

What is Trans isomerism?

Answer 23

Groups/atoms are on Opposite sides across the double bond

Question 24

What mechanism do Alkenes often undergo?

Answer 24

Electrophilic addition

Question 25

What is the structure of a carbonyl group?

Answer 25

C=O bond bond is polar due to electronegativity

Question 26

How are aldehydes formed?

Answer 26

Oxidation of primary alcohols

Question 27

How are Ketones formed?

Answer 27

Oxidation of secondary alcohols

Question 28

Where do carbonyls have an IR peak?

Answer 28

1600-1900cm-1

Question 29

What compound forms an orange precipitate with carbonyls?

Answer 29

2,4-dinitrophenylhydrazine

Question 30

What is tollens reagent and what does it do?

Answer 30

Ammoniacal silver nitrate Oxidises aldehydes forming a silver mirror

Question 31

What is the equation involving the silver mirror test?

Answer 31

[Ag(NH3)2]+