Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Jeff Science UR > UR Chemistry Revision Questions > Flashcards

UR Chemistry Revision Questions Flashcards

1
Q

What is the composition of Air?

A

78% nitrogen, 20% oxygen, 0.04% carbon dioxide, 1% noble gases, water vapour and pollutants variable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Is air a mixture, compound or element?

A

Mixture

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Which gas is the only reactive gas in air?

A

Oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the percentage of this gas?

A

20.0%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Describe a physical test & result for water (this will prove its purity).

A

Test its boiling point, it will boil at 100,C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Describe the test and result for carbon dioxide.

A

Bubble the gas through Limewater, turns from clear to cloudy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Describe the test and result for hydrogen.

A

Test with a lighted splint, burns with a squeaky pop.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Describe the test and result for oxygen.

A

Test with a glowing splint, this will relight (oxygen supports combustion)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Name the gas given off when potassium permanganate (vii) is decomposed.

A

oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Name the gas given off when limestone is heated.

A

carbon dioxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the chemical name for limestone?

A

calcium carbonate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which separation technique would be used to separate sand from a mixture of salt solution and water?

A

Filtration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which separation technique would be used to separate the salt from a salt solution?

A

Evaporation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which separation technique would be used to separate both the salt and the water?

A

Distillation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which separation technique would be used to separate a mixture of ethanol and water?

A

Fractional distillation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Which separation technique would be used to separate the colours in a selection of dyes?

A

Chromatography

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

In salt solution what is the name of the solute?

A

Salt -sodium chloride

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

In salt solution what is the name of the solvent?

A

Water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the name for a soluble solid?

A

Solute

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Define a saturated solution.

A

A solution in which no more of the solute can be dissolved at that temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Write the word equation for combustion.

A

fuel +oxygen → carbon dioxide + water vapour + soot (Carbon)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Which two elements are contained in the fuel (hydrocarbon)?

A

carbon and hydrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Which gas is needed for fuels to burn?

A

oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Name three fuels.

A

Coal, oil, gas (methane -natural gas), wood, petrol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Rusting requires two chemicals to react with the iron or steel-name them.

A

oxygen and water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Name three ways to prevent rusting.

A

Painting, galvanising, oiling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

metal + oxygen →

A

metal oxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

copper + oxygen →

A

copper oxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What colour change would you see when copper is heated in oxygen?

A

Change from pink/brown to black

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

magnesium + oxygen →

A

magnesium oxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

What colour change would you see when magnesium is heated in oxygen?

A

Light shiny grey to white

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

MetaI + water →

A

metal hydroxide + hydrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Calcium + water→

A

calcium hydroxide + hydrogen

34
Q

What colour change would you see if green universal indicator solution was added to bases?

A

From green to blue/purple (alkaline solutions)

35
Q

Complete these acid reaction word equations: metal + acid →

A

metal salt + hydrogen

36
Q

magnesium + hydrochloric acid →

A

magnesium chloride + hydrogen

37
Q

magnesium + sulphuric acid →

A

magnesium sulphate + hydrogen

38
Q

magnesium + nitric acid →

A

magnesium nitrate + hydrogen

39
Q

metal oxide + acid → (base)

A

metal salt + water

40
Q

zinc oxide + sulphuric acid →

A

zinc sulphate + water

41
Q

metal hydroxide + acid → (alkali)

A

metal salt + water

42
Q

sodium hydroxide + hydrochloric acid →

A

sodium chloride + water

43
Q

What type of chemical reaction is sodium hydroxide + hydrochloric acid?

A

Neutralisation

44
Q

Calcium carbonate + heat →

A

calcium oxide + carbon dioxide

45
Q

What is a thermal decomposition reaction?

A

A reaction in which a compound is broken down into simpler substances

46
Q

carbonate + acid →

A

Salt + water + carbon dioxide

47
Q

calcium carbonate + hydrochloric acid →

A

calcium chloride + water + carbon dioxide

48
Q

copper carbonate + sulphuric acid →

A

copper sulphate + water + carbon dioxide

49
Q

Which gas is given off when carbonates are heated or added to acid?

A

carbon dioxide

50
Q

iron + copper sulphate →

A

iron sulphate + copper

51
Q

What colour changes would you see in the reaction iron + copper sulphate?

A
  1. The blue copper sulphate solution becomes less blue. 2. There is formation of a pink/brown solid (copper)
52
Q

What type of chemical reaction is iron + copper sulphate?

A

Displacement

53
Q

copper oxide + carbon →

A

copper + carbon dioxide

54
Q

What type of chemical reaction is copper oxide + carbon?

A

Oxidation -reduction

55
Q

What does oxidation mean?

A

Gaining oxygen

56
Q

What does reduction mean?

A

Losing oxygen

57
Q

Which reactant is oxidised in the reaction copper oxide + carbon?

58
Q

Which reactant is reduced in the reaction copper oxide + carbon?

A

copper oxide

59
Q

Which other non-metallic element can be used as a reducing agent?

60
Q

copper oxide + hydrogen →

A

copper +water (hydrogen oxide)

61
Q

Name five properties of metals.

A

Good conductors of heat and electricity, malleable, sonorous, high melting points, shiny, form basic oxides

62
Q

Name five properties of non-metals.

A

Poor conductors of heat and electricity, insulators, brittle, low melting and boiling points, dull, form acidic oxides.

63
Q

Name five metals.

A

Magnesium, copper, sodium, calcium, zinc, lithium, titanium, aluminium, potassium, iron, nickel, cobalt,

64
Q

Name five non-metals.

A

Oxygen, sulphur, carbon, nitrogen, helium, hydrogen, argon, xenon, radon, chlorine, iodine, bromine

65
Q

What type of oxide do metals form?

66
Q

What type of oxide do non-metals form? Hydrogen is the exception - what type of oxide does it form?

A

Acidic / Neutral -water

67
Q

Acids have a pH value from _______ to _______, neutral substances have a pH value of _______ and alkalis have a pH from ________ to ________. A strong acid could be ________ having a pH of 1. A strong alkali could be ________ having a pH of 14. An example of a neutral substance is ________

A

zero, six seven eight, fourteen, hydrochloric, sodium hydroxide solution, water

68
Q

Name two everyday uses of neutralisation and what is used to neutralise the excess acid or alkali.

A
  1. neutralising acidic soil-Lime (calcium oxide) is used by farmers for this / 2. treating acid indigestion
69
Q

Why do we use weak acids or alkalis for neutralising?

A

a weak alkali such as magnesium hydroxide (milk of magnesia), an antacid is used So that the neutralisation can be done carefully and more can be added if necessary.

70
Q

Name three pollutant gases.

A

Carbon dioxide, sulphur dioxide, nitrogen oxides

71
Q

How are these three pollutant gases formed?

A

Carbon dioxide is formed from combustion, sulphur dioxide is formed by burning fossil fuels and nitrogen oxides are formed from vehicle exhausts

72
Q

What are the effects of these gases on the environment?

A

Carbon dioxide is responsible for the greenhouse effect -global warming, sulphur dioxide and nitrogen oxides dissolve in rain water and form acid rain -pH lower than 6.

73
Q

sulphur, carbon, copper, magnesium, zinc, sodium Which forms a pollutant gas?

A

carbon, sulphur

74
Q

sulphur, carbon, copper, magnesium, zinc, sodium Which is a dull, yellow solid?

75
Q

sulphur, carbon, copper, magnesium, zinc, sodium Which is used for galvanising?

76
Q

sulphur, carbon, copper, magnesium, zinc, sodium Which can be used for hot water pipes?

77
Q

sulphur, carbon, copper, magnesium, zinc, sodium Which forms a white oxide when heated in air (oxygen)?

78
Q

sulphur, carbon, copper, magnesium, zinc, sodium Which is the most reactive metal (it has to be stored in oil)?

79
Q

Name two oxides that do not change chemically when heated.

A

magnesium oxide, copper oxide, zinc oxide

80
Q

What do compound names end in when there are two elements chemically combined? Give an example.

Jeff Science UR (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions