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Chemistry Additional > Pass Papers > Flashcards

Pass Papers Flashcards

1
Q

Diamond has a …. melting point

A

High

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2
Q

A nano diamond contains a few …. atoms

A

Hundred

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3
Q

Why can diamond be used for drill bits?

A

As they are hard

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4
Q

What type of Atom in diamond made from?

A

Carbon

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5
Q

Each atom in a Diamond is bonded to …. other atoms

A

Four

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6
Q

What structure does a diamond have

A

A covalent

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7
Q

In diamond ___ of the atoms are bonded together

A

All

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8
Q

Nitinol is a Shape memory___

A

Alloy

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9
Q

Why are mixture of metals harder than pure metal?

A

Because they have bigger atoms

They have no layors to slide

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10
Q

What two factors do you have to consider when choosing the metal for braces?

A

Cost

Resistant to corrosion

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11
Q

Word equation for Sulfer dioxide with oxygen

A

Sulphur Dioxide+Oxygen–> Sulfer Trioxide

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12
Q

Sulfer dioxide is a

A

Compound

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13
Q

When the pressure of the gas is increased the frequency of the collisions

A

Increases

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14
Q

The minimum amount of energy that particles need to react is called the

A

Activation energy

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15
Q

What’s one way if increasing the rate of reaction other than changing pressure

A

Using a catalyst

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16
Q

Atoms with different numbers of nuetrons are called

A

Isotopes

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17
Q

Compared with proton, the mass of an electron is

A

Very small

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18
Q

What’s the acid are used to make ammonium nitrate

A

Nitric acid

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19
Q

How is solid ammonium nitrate obtained from the solution

A

Evaporation

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20
Q

I found the ammonium nitrate fertiliser on to a field of grass suggest what could happen to the grass

A

The grass will grow faster

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21
Q

Why does solid magnesium chloride not conduct electricity

A

As the ions can’t move

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22
Q

Why does magnesium irons move to the negative electrode

A

As it is positive which attracts

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23
Q

What does this symbol mean —–>

A

Reversible reaction

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24
Q

In an endothermic reaction the temperature of the surroundings

A

Decreases

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25
Q

In a paper chromatography reaction to start and I should be drawn with a ruler and pencil give a reason for your answer

A

So it won’t dissolve

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26
Q

Give three conclusion she can make from the students results in a paper chromatography

A

Two colours and fruit drink

Three colours in Coke

Some colours in the drink Are different

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27
Q

Why do you different compounds separate in a gas chromatography column

A

As different substances travel at different speeds

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28
Q

Large amount of caffeine can be harmful only one of the questions on the table can be answered by science alone what’s the answer

A

Is there some caffeine in a certain brand of drink

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29
Q

Give two reasons one of the questions cannot be answered by science alone

A

Cannot be done by experiment

Economic issues

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30
Q

Relative mass of a proton

A

1

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31
Q

What’s relative mass of the neutron

A

One

32
Q

What’s relative mass of electron

A

Very small

33
Q

What is the total number of protons and neutrons in an atom called

A

The mass number

34
Q

Carbon reacts with oxygen to produce carbon dioxide

how many different elements are there I’m on molecule CO2

A

2

35
Q

What is the total number of atoms in the molecule carbon dioxide

A

3

36
Q

I need your method is used to measure the amount of carbon dioxide in the air give one reason for using an instrumental method

A

Accurate

37
Q

What is the property of substance that have simple molecule

A

Have no overall electrical charge

38
Q

Which one of the following questions cannot be answered by science alone

A

Should Iodine be added to salt in food

39
Q

Give one reason why this question cannot be answered by science alone

A

Can’t be done by experiment

40
Q

A student producer so am I near nitrate by adding an acid to ammonia solution name the acid used

A

Nitric acid

41
Q

Ammonia solution (ammonium hydroxide) is

A

An alkali

42
Q

Student I did a few drops of solution which change colour when the reaction was complete.
The solution added is an

A

Indicator

43
Q

How is solid ammonia nitrate made from a solution of ammonia nitrite

A

Crystallisation

44
Q

Why do you pharmacies ammonium nitrate on their fields

A

To help crops grow

45
Q

State one reaction condition that can be changed when making polyethene

A

Pressure

46
Q

What type of substance is lead iodide

A

Compound

47
Q

What’s the word equation for precipitation reaction

A

Lead nitrate+Potassium Iodide= lead iodide+ Potassium nitrate

48
Q

Explain why the apparatus in figure 3 would not separate the lead iodide from the mixture

A

Paper is missing is a solid will go through

49
Q

The student expected to get 5 g but only got 3 g give one reason why the mass the student got was less than expected

A

As some product may have got lost

50
Q

Just one reason why spoons are electroplated

A

Improve lifespan

51
Q

What is made from chlorine

A

Bleach

52
Q

Why is hydrogen produced at the negative electrode and not sodium

A

As hydrogen is less reactive than sodium

53
Q

What is the type of bond in a molecule of hydrogen chloride

A

Covalent

54
Q

Why is hydrogen chloride a gas at room temperature

A

Hydrogen chloride has a low boiling point

Hydrogen chloride is made of simple molecules

55
Q

Name a gas produced at the positive electrode

A

Oxygen

56
Q

At the negative electrode Aluminium ions gain electrons to produce aluminium what is this type of reaction called?

A

Reduction

57
Q

Metals can be bent and shaped because the layers of atoms can

A

Slide

58
Q

Graphite has

A

Strong covalent bonds

59
Q

State one conclusion the student could make about the effect of the temperature on the rate of reaction

A

High temperature faster reaction

60
Q

A student investigated how the surface area of marble chips affected the rate of reaction
State 2 variables

A

Concentration of acid

Mass of marble chips

61
Q

Give one reason why are using a catalyst reduces cost

A

Catalyst is not used up

62
Q

Explain in terms of structure, why some polymers are thermosettinf

A

Because they cannot slide and they have cross links

63
Q

What does gas chromatography do to the substance

A

Separates

64
Q

Give two reasons for using instrumental methods for analysis

A

Quick and accurate

65
Q

Ionic compounds are made of

A

Giant lattices

66
Q

Solid potassium chloride does not conduct electricity because the ions

A

Cannot move

67
Q

What could students do to the potassium chloride to make it conduct electricity

A

Melt it

68
Q

When the potassium irons reach the negative electrode they turn into potassium

A

Atom

69
Q

Name the type of bond between the carbon and hydrogen atoms in methane

A

Covalent

70
Q

Explain why methane is a gas at 20*C

A

Low boiling point has a small molecule

71
Q

Why are alloys harder than iron

A

Particles cannot be layered therefore cannot slide

72
Q

How could the solid lead iodide be separated from the solution

A

Filtering

73
Q

Name the acid used to produce ammonium nitrate

A

Nitric

74
Q

The reaction of Ammonia with an acid is a

A

Neutralisation reaction

75
Q

Sodium chloride are held together by strong

A

Electrostatic forces

Chemistry Additional (14 decks)

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