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WorksheetsCockermouth School - GCSE Chemical change (metals)
Total questions: 40
Worksheet time: 22mins
Name
Class
Date
1.
What is the reactivity series?
a)
Periodic table
b)
Sports event
c)
General reactivity of atoms
d)
Order of element reactivity
2.
How can metals be placed in order of their reactivity?
a)
Comparing flammability
b)
Comparing reactions of metals with acid
c)
Comparing general properties
d)
Comparing colour
3.
What is the name for a reaction where oxygen is removed from a compound?
a)
Oxidation
b)
Reduction
c)
Deoxidation
d)
Oxidation
4.
Explain why zinc can be extracted from zinc oxide with carbon
a)
Carbon is more reactive than zinc
b)
Carbon is less reactive
c)
Carbon is more attractive
d)
Carbon is less attractive
5.
Explain why gold and silver can be found naturally in the Earth's crust
a)
They are very unreactive
b)
Lucky
c)
They're expensive
d)
They are used for jewellery
6.
What process is used to extract metals more reactive than carbon
a)
Smelting
b)
Electrolysis
c)
Burning
d)
Neutralisation
7.
What is a material containing enough metal in it for it to be economically worthwhile to extract the metal.
a)
Compound
b)
Oar
c)
Ore
d)
Phytomining
8.
What type of reaction occurs when a more reactive element takes the place of a less reactive element?
a)
Phytomining
b)
Neutralisation
c)
Hydrolysis
d)
Displacement
9.
Define oxidation in terms of electrons
a)
Loss of electrons
b)
Gain of electrons
c)
Electrons are maintained
d)
Electrons anihilate
10.
Define reduction in the context of loss and gain of electrons
a)
Loss of electons
b)
Reduction is the gain of electrons
c)
Electrons are maintained
d)
Electrons anihilate
11.
Which of the substances below has been oxidized ? Al³⁺ + Fe → Fe³⁺ + Al
a)
Fe
b)
Al3+
c)
Al
d)
Fe³⁺
12.
Which of the substances below has been reduced ? Al³⁺ + Fe → Fe³⁺ + Al
a)
Fe
b)
Al
c)
Al3+
d)
Fe³⁺
13.
What is the correct half equation for Al³ in this reaction? Al³⁺ + Fe → Fe³⁺ + Al
a)
Al³⁺ - 3e⁻ → Al
b)
2Al³⁺ + 6e⁻ → Al2
c)
Al³⁺ + e⁻ → Al
d)
Al³⁺ + 3e⁻ → Al
14.
What is the correct half equation for Fe in this reaction? Al³⁺ + Fe → Fe³⁺ + Al
a)
Fe³⁺ - 3e⁻ → Al
b)
2Fe³⁺ + 6e⁻ → Fe2
c)
Fe³⁺ + e⁻ → Fe
d)
Fe → Fe³⁺ + 3e-
15.
Define acid in terms of pH
a)
pH = 7
b)
pH of less than 7
c)
pH = 1
d)
pH gretaer than 7
16.
Define acids in terms of ions
a)
Releases H⁺ ions in water
b)
Releases OH- ions in water
c)
Completely ionises in water
d)
Partially ionises in water
17.
What does (aq) stand for?
a)
Aqua. Water based
b)
Aqualine.
c)
Aqueous: dissolved in water
d)
Aqua vita.
18.
Which of these is a common acid?
a)
Sulphuric acid, H₂SO₄
b)
Sodium Hydroxide, NaOH
c)
Ammonia, NH3
d)
Ethanoic acid, CH3COOH
19.
What is a neutral solution?
a)
pH - 6
b)
pH = 1
c)
pH - 14
d)
pH = 7
20.
How do you measure pH?
a)
Colour
b)
With an indicator or pH probe.
c)
Smell
d)
Taste
21.
What is a base?
a)
Bottom of an acid
b)
Primary colour
c)
Substance that neutralises an acid
d)
Reacts with alkali to neutralise it.
22.
What is an alkali?
a)
A soluble acid
b)
Metal carbonate
c)
A soluble base e.g. Hydroxide
d)
Metal oxide
23.
Which ions are always present in a solution of an alkali?
a)
H+
b)
Na+
c)
OH⁻
d)
O2-
24.
What is a salt?
a)
Cooking ingredient
b)
NaCl
c)
Ionic compound of metal + non-metal element
d)
Mixture of elements
25.
What type of salts are formed by nitric acid?
a)
Nitrate
b)
Sulfate
c)
Carbonate
d)
Chloride
26.
What type of salts are formed by sulfuric acid?
a)
Nitrate
b)
Carbonate
c)
Chloride
d)
sulfate
27.
What type of salts are formed by hydrochloric acid?
a)
Nitrate
b)
Chloride
c)
Chlorate
d)
Sulfate
28.
What is a neutralisation reaction?
a)
Removing ions from a solution
b)
Acid reacting with base or alkali
c)
Displacement reaction
d)
Salt forming reaction
29.
Which ions always react together during neutralisation?
a)
Na+ and Cl-
b)
H+ and NH4+
c)
H⁺ and OH⁻
d)
H- and OH+
30.
Which ionic equation is neutralisation?
a)
Na+ + Cl- → NaCl
b)
H- and OH+ → H₂O
c)
H- and OH+ → H₂O2
d)
H⁺ + OH⁻ → H₂O
31.
metal + acid →
a)
→ salt + oxygen
b)
→ salt + hydrogen gas
c)
→ salt + carbon dioxide
d)
→ salt + carbon dioxide + water
32.
metal hydroxide + acid →
a)
→ salt + water
b)
→ salt + oxygen
c)
→ salt + carbon dioxide
d)
→ salt + carbon dioxide + water
33.
metal oxide + acid →
a)
→ salt + oxygen
b)
→ salt + water
c)
→ salt + carbon dioxide
d)
→ salt + carbon dioxide + water
34.
metal carbonate + acid →
a)
→ salt + oxygen
b)
→ salt + water + carbon dioxide
c)
→ salt + carbon dioxide
d)
→ salt + hydrogen gas
35.
If a salt is in solution, how do you extract it as a solid?
a)
Filter it
b)
Chromatography
c)
Freezing
d)
Evaporate water off.
36.
What is a strong acid?
a)
Partially dissocites in water
b)
Dissolves in water
c)
Corrosive
d)
Completely dissociates in water
37.
What is a weak acid?
a)
Dissolves in water
b)
Partially dissociates in water
c)
Corrosive
d)
Completely dissociates in water
38.
What is the relationship between the strength of an acid and its pH?
a)
pH decreases as H+ ions increase
b)
pH inceases as H+ ions increase
c)
None
d)
Proportional
39.
What is a concentrated acid?
a)
Few particles per volume
b)
Strong
c)
Lots of particles per volume.
d)
Weak
40.
What is a dilute acid?
a)
Strong
b)
Weak
c)
Lots of particles per volume.
d)
Few particles per volume.
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