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N5 Chemistry Revision > Unit 2 > Flashcards

Unit 2 Flashcards

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1
Q

The test for oxygen?

A

Re lights are glowing splint

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2
Q

The test for carbon dioxide?

A

Turns lime water cloudy.

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3
Q

Test for hydrogen?

A

Burns with a squeaky pop

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4
Q

The test for nitrogen?

A

No test

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5
Q

What is a fuel?

A

Fuel is a chemical that burns to release energy

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6
Q

Name some fossil fuels

A

Coal
Oil
Peat

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7
Q

Fossil fuels are finites what is meant by the word finite?

A

Non-renewable

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8
Q

What is a homologous series?

A

À homologus séries is a group of chemicals with similar chemical properties and can be represented by a general formula.

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9
Q

What is an isomer?

A

And Isomer has the same molecular formula but has different structural formula

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10
Q

What is the formula for an alkane?

A

CnH2n+2

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11
Q

What is the formula for the alkene

A

CnH2n

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12
Q

What is the formula for a cyclo alkane?

A

CnH2n

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13
Q

What is meant by the term saturated.

A

Saturated as when himologus series has a carbon to carbon single bond

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14
Q

What is meant by the term unsaturated?

A

When a homologous series has a carbon to carbon double bond

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15
Q

What is combustion?

A

Combustion is when something burns with a plentiful supply of oxygen

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16
Q

What is incomplete combustion?

A

Incomplete combustion is when something burns with a limited supply of oxygen

17
Q

What does hydrocarbon contain?

A

Hydrogen and carbon only

18
Q

What is distillation?

A

Distillation is when liquids are separated by the difference of boiling points

19
Q

What is fractional distillation?

A

Fractional distillation is when crude oils are separated by the difference and boiling points

20
Q

What is the test for saturation?

A

Place the solution in bromine water

21
Q

What happened to the bromine water if it is saturated?

A

If it is saturated the bromine water stays the same

22
Q

What happens if the bromine water is unsaturated?

A

If it’s un saturated then the bromine water decolourises

23
Q

What is an addition reaction?

A

And addition reaction is when the double bond partially breaks and attacking molecule joins on

24
Q

What is it called of hydrogen is added on?

A

Hydrogenation

25
Q

What is it called if water is added on?

A

Hydration

26
Q

What happens in cracking?

A

in cracking heat is used to break the intermolecular forces to make hydrocarbons smaller

27
Q

What do you do to avoid suck back?

A

Remove the tube before you stop heating

28
Q

What do you do to form an alcohol?

A

You need to go through a process called fermentation

29
Q

What is fermentation

A

Fermentation is when an enzyme breaks down carbohydrates to form alcohol and water

30
Q

What is the maximum concentration produced why and why is this?

A

12% this is because the enzyme stops working

31
Q

What happens after fermentation?

A

Distillation is then carried out

32
Q

Alkanoic acids can be known by their what group?

A

Carboxyl group (OOH)

33
Q

Carbohydrates are made up of?

A

Carbon hydrogen and oxygen

34
Q

Name the two groups of carbohydrates

A

Sugar and starch

35
Q

How do you make Carbohydrates?

A

By either photosynthesis or respiration

36
Q

What is hydrolysis?

A

Hydrolysis is when a molecule is broken down using water

37
Q

What is dehydration?

A

Dehydration is when a reaction takes place which involves removing water

38
Q

alkanols can be represented by?

A

Hydroxyl group (OH)

39
Q

What is a condensation reaction?

A

A condensation reaction is when two molecules react together to produce a large molecule and water

N5 Chemistry Revision (3 decks)

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