Brainscape's Knowledge GenomeTM

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


See full index

Past Paper Crashes > Chemistry > Flashcards

Chemistry Flashcards

1
Q

Properties of ionic compouds

A

They form crystals
They have high melting points and high boiling points
They have higher enthalpies of fusion and vaporization than molecular compounds
They’re hard and brittle
They conduct electricity when they are dissolved in water
They’re good insulators

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

Processes that support the particulate nature of matter

A

osmosis, diffusion, brownian motion

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

Charge and mass of a neutron

A

Charge (0), Mass (1)

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

Charge and mass of a proton

A

Charge (+1), Mass (1)

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

Why is sulfuric acid stronger than ethanoic acid in aqueous solution

A

because of its lower degree of ionization

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

What is the boiling point of NaCl

A

1465

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

Isotopes of an element contain

A

the same number of protons and electrons

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

What is endothermic change?

A

if heat is absorbed by the system from the surroundings

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

What is element X’s position on the periodic table if it’s electronic configuration is 2.8.1

A

Period 3 Group 1

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

What is an addition reaction?

A

a class of chemical reactions in which an atom or group of atoms is added to a molecule

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

What is a substitution reaction?

A

of a class of chemical reactions in which an atom, ion, or group of atoms or ions in a molecule is replaced by another atom, ion, or group

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

What is an addition polmerization reaction?

A

reaction adds new monomer units to the growing polymer molecule one at a time through double or triple bonds in the monomer

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

What is a condensation polmerization reaction?

A

a form of step-growth polymerization in which monomers and/or oligomers react with each other to form larger structural units while releasing smaller molecules as a byproduct such as water or methanol

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

The correct order increasing particle size of mixtures

A

solutions, colloids, suspensions

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

In simple terms what is an acid?

A

a proton donor

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

What does an ionic bond formation result from?

A

the electrostatic attraction between oppositely charged ions in a chemical compound

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

What mass of oxygen atoms contains the same number of moles as 112g of sulfer atoms?

A

56.00g

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

Ethanoic acid reacts with reacts with ethanol to produce an ester and water. How many moles of ethanoic acid are required to produce 0.5 moles of ester?

A

0.5

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

Which substance can a sloid be obtained by the process of sedimentation?

A

Suspensions

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

Which halogen is liquid at room temp.?

A

Bromine

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

A piece of metal reacted with an acid to produce hydrogen gas. Describe the steps that should be employed to increase the rate of reaction?

A

Increasing temp and subdividing the piece of metal

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

Which property increases across period 3 in the periodic table?

A

Atomic number

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

Which substances do NOT produce water when reacted with acid?

A

Active metals

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

A piece of calcium was added to some distilled water, bubbles of gases formed and it appeared cloudy. The gas is expected to..

A

give a pop with a lighted splint

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

What is an acid salt?

A

a salt formed by incomplete replacement of the hydrogen of an acid

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

Sodium hydrogen carbonate and hydrochloric acid reacted to produce sodium chloride. The mixture effervessed was caused by

A

Carbon dioxide

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

What is the formula of ammonium carbonate?

A

(NH4)2(CO3)2

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

What product would be produced by the electrolysis of dilute sulfuric acid/

A

Cathode (H2), Anode (O2)

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

Magnesium oxide is

A

basic

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

When a metal atom becomes an ion

A

it loses electrons and is oxidised

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

An alloy is

A

a mixture of metals

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

What method is used for the extraction of aluminum?

A

electrolysis of its molten oxide

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

Explain why aluminum products do NOT deteriorate in the air as iron products overtime

A

both metals form oxide coats but aluminum oxide prevents further reaction when iron oxide doesn’t

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

FeCO3 –> FeO –> Fe2(SO2)4 –> Fe(OH)3. What is a suitable reagent to use at stage 4?

A

Aqueous sodium hydroxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

What element is an important constituent in chlorophyll.

A

Magnesium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

The existence of millions or organic compounds is due primarily to the ability of carbon to form

A

multiple bonds, ring structures, branched chains

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Copper and Aluminum are both good conductors of electricity, but aluminum is preferred because

A

it is lighter and resistant to corrosion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

What aqueous solution will produce a yellow perciptate with aqueous potassium iodide?

A

Lead nitrate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

What is observed when EXCESS aqueous ammonium is added to a solution of copper (II) sulfate?

A

deep blue solution

40
Q

What is the formula for hexane?

A

C6H14

41
Q

What is an isomer?

A

each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties

42
Q

Which reaction involves the boiling of a fat or oil with aqueous sodium sodium hydroxide?

A

Saponification

43
Q

What is true of both alkenes and alkanes?

A

they burn in the air to give CO2 and water, alkenes go under addition reactions while alkanes go under substitution reactions, alkanes are saturated hydrocarbons and alkenes are unsaturated hydrocarbons

44
Q

A solution has a pH of 1 . The solution would be expected to react with

A

zinc metal to produce hydrogen

45
Q

What compound would will react with ethanoic acid acid to form an ester?

A

CH3CH2OH

46
Q

What is the equation to represent the fermentation of sugars, using glucose as the substrate

A

C6H12O6 –> 2C2H2OH + 2CO2

47
Q

Why is ethane described to be unsaturated?

A

molecule contains at least one double bond

48
Q

ALL members of the homologous series have similar

A

chemical properties

49
Q

What is a natural source of hydrocarbons?

A

Petroleum

50
Q

What hydrocarbon is a MAJOR constituent of natural gas?

A

Methane

51
Q

An atom has 20 electrons and when it ionizes it has the same electronic configuration as

A

Argon

52
Q

What elements do NOT form simple ions by gaining or losing electrons?

A

Carbon

53
Q

What is the balanced equation for the reaction between aqueous silver nitrate and aqueous sodium chloride

A

AgNO3(aq) + NaCl(aq) —-> AgCl(s) + NaNO3(aq)

54
Q

What acid will not form an acid sat?

A

CH3CO2O

55
Q

What oxide may show acidic and basic prperties?

A

aluminum oxide

56
Q

Copper (II) Oxide and Copper (II) Sulfate can be separated by

A

shaking with excess water and then filtering

57
Q

Element that exhibits allotropy

A

Carbon

58
Q

What is TRUE about of an endothermic reaction?

A

heat is absorbed from the surroundings

59
Q

Which of the following substances will electrolysis NOT occur when an electrical is passed through it:
sodium hydroxide solution, molten sodium chloride, solid sodium chloride or dilute sulfuric acid

A

Solid sodium chloride

60
Q

Which are physical properties of ionic substances

  1. high melting point
  2. soluble in organic substances
  3. Good conductors of electricity in liquid state
A

high melting point, soluble in organic substances

61
Q

What substance, when added to pure water SIGNIFICANTLY increases in water conductivity?

A

Sodium Chloride

62
Q

A separating funnel can be used to separate

A

Water and Kerosine

63
Q

The pH of sugar can juice is more efficient when

A

adding slaked lime

64
Q

Acid salts…

A

form a normal salt when all replaceable hydrogen of the acid is removed, anions can dissociate to give hydrogen ions

65
Q

What procedures increase the rate of reaction

A

increasing temp., subdividing the lump of metal

66
Q

Atomic number of an element is defined as the number of

A

protons

67
Q

What is TRUE about the eqn.

Mg(s) + H2SO4(aq) —-> MgSO4(aq) + H2(g)

A

Mg is oxidized from 0 to +2

68
Q

Element used to determine relative atomic mass of another element is

A

carbon-12

69
Q

27
13 X

This element has how many protons/neutrons

A

13 protons, 14 neutrons

70
Q

Molecular formular of an alcohol whose boiling point is 180.

A

CH3(CH2)6OH

71
Q

What is the name of the compound CH3CH2CH2CH2OH

A

1-butanol

72
Q

Organic acid + alcohol —> ester + water

  1. This reaction is a
  2. And the reverse reaction is
A
  1. esterification

2. hydrolysis

73
Q

What is ‘cracking’

A

large alkane molecules into smaller alkene and alkane molecules

74
Q

RCOOH(aq) + NaOH(aq) —> RCOONa(aq) + H2O(l)

This reaction is a…

A

nuetralization

75
Q

An organic substance that decolourizes bromine water immediately is…

A

alkene

76
Q

The structure of NaCl

A

Ionic crystal

77
Q

The structure of copper

A

Metallic

78
Q

Test to identify an acid gas

A

damp blue litmus where blue turns red

79
Q

Test to identify ammonium gas

A

damp red litmus where red turns blue

80
Q

Which conversion represents the dehydration of ethanol

A

CH3CH2OH —> C2H4

81
Q

Glucose is converted to starch by

A

condesation polymerization

82
Q

Compounds in a homologous series differ

A

successively by a CH2 group

83
Q

Ethen reacts with hydrogen, chlorine and hydrogen chloride, these reactions are examples of

A

addition

84
Q

Name a few polymers

A

nylon, protein, cellulose

85
Q

What is true of sulfer

  1. It is used in the vulcanization of rubber
  2. used in the extraction of iron from it’s ore
  3. used in manufacture of explosives
A

It is used in the vulcanization of rubber, used in manufacture of explosives

86
Q

Soapless detergents are

A

not affected by hard water

87
Q

A solution treated with sulfer dioxide gas becomes green, it contains…

A

potassium dichromate

88
Q

A suitable drying agent for the prep. of ammonia gas is

A

CO2

89
Q

Copper (II) Carb. heated in a test tube, produced a gas expected to…

A

form a white percipitate with aqueous calcium hydroxide

90
Q

An element that is a non metal froms

A

acidic oxide

91
Q

Observation when EXCESS aqueous ammonia is added to a solution of copper (II) sulfate.

A

deep blue solution

92
Q

Which metals reacts vigorously with water to produce a strong alkaline solution

A

Na

93
Q

Which metal has an alloy used to manufacture aircrafts

A

Al

94
Q

MAIN substances responsible for acid rain

A

Sulfur dioxide and sulfur trioxide

95
Q

Observation when aqueous silver nitrate is added to potassium chloride

A

white precipitate appears

96
Q

When element is important in heamoglobin?

A

Iron

97
Q

Which gas gives a positive test with dry cobalt chloride paper?

A

H2

Past Paper Crashes (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions