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Forensic science year 1 > Forensic chemistry > Flashcards

Forensic chemistry Flashcards

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1
Q

What is Catenation?

A

The ability to form bonds between atoms of the same element

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2
Q

What is the suffix and example of an alkane?

A

-ane
Ethane

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3
Q

What is the suffix and example of an Alkene?

A

-ene
Ethene

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4
Q

What is the suffix and example of an Alkyne?

A

-yne
Ethyne

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5
Q

What is the suffix and example of an Haloalkane?

A

halo-
Chloroethane

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6
Q

What is the suffix and example of an Alcohol?

A

-ol
Ethanol

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7
Q

What is the suffix and example of an Aldehyde?

A

-al
Ethanal

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8
Q

What is the suffix and example of an Ketone?

A

-one
Ethanone

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9
Q

What is the suffix and example of an Carboxylic acid?

A

-oic acid
Ethanoic acid

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10
Q

What is the suffix and example of an Acyl chloride?

A

-oyl chloride
Ethanoyl chloride

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11
Q

What is the suffix and example of an Amide?

A

-amide
Ethanamide

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12
Q

What is the suffix and example of an Ester?

A

-yl -oate
Methyl ethanoate

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13
Q

What is the suffix and example of an Nitrile?

A

-Nitrile
Ethanenitrile

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14
Q

What is the suffix and example of an Amine?

A

-amine
Methylamine

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15
Q

What is the suffix and example of an Nitro?

A

Nitro -
Nitroethane

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16
Q

What is the suffix and example of an Sulphonic acid?

A

-sulphonic acid
benzene sulphonic acid

17
Q

What is the suffix and example of an Ether?

A

-oxy -ane
Ethoxyethane

18
Q

What is a free radical?

A

Reactive species which possess an unpaired electron

19
Q

What are some ways a free radical is formed?

A

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

20
Q

What are the conditions needed in the Chlorination of Methane?

A

Uv light
Sunlight

21
Q

What type of reaction is the chlorination of methane?

A

Free radical substitution

21
Q

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

A

Planar
120

22
Q

What is CIS isomerism?

A

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

23
Q

What is Trans isomerism?

A

Groups/atoms are on Opposite sides across the double bond

24
Q

What mechanism do Alkenes often undergo?

A

Electrophilic addition

25
Q

What is the structure of a carbonyl group?

A

C=O bond
bond is polar due to electronegativity

26
Q

How are aldehydes formed?

A

Oxidation of primary alcohols

27
Q

How are Ketones formed?

A

Oxidation of secondary alcohols

28
Q

Where do carbonyls have an IR peak?

A

1600-1900cm-1

29
Q

What compound forms an orange precipitate with carbonyls?

A

2,4-dinitrophenylhydrazine

30
Q

What is tollens reagent and what does it do?

A

Ammoniacal silver nitrate
Oxidises aldehydes forming a silver mirror

31
Q

What is the equation involving the silver mirror test?

A

[Ag(NH3)2]+

Forensic science year 1 (6 decks)

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