2715133
Description
Quiz by 10jonty.bird, updated more than 1 year ago
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Created by 10jonty.bird
almost 9 years ago
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Question 1
Question
Alkali metals react with non-metals to form __________.
Answer
-
Noble gases
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Acids
-
Macromolecules
-
Hydroxides
-
Ionic compounds
-
Insoluble Bases
-
Hydrogen
Question 2
Question
Ionic compounds are held together by ___________.
Answer
-
Strong ionic bonds
-
Strong intermolecular forces
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Very strong Covalent Bonds
-
Delocalised electrons
-
Strong Electrostatic forces
Question 3
Question
Ionic bonds dissolve in water.
Answer
- True
- False
Question 4
Question
When atoms share electrons they form __________.
Answer
-
Ionic bonds
-
Covalent bonds
-
Strong intermolecular forces
-
Electrostatic forces
-
Macromolecules
Question 5
Question
Simple molecules do not conduct electricity because . . . .
Answer
-
They have delocalised electrons.
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The intermolecular forces are too weak.
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The molecules have no overall charge.
-
There are no layers.
-
They are too large.
Question 6
Question
When melted ionic compounds conduct electricity.
Answer
- True
- False
Question 7
Question
What function of Nitinol makes it particularly useful in braces.
Answer
-
It is a shape memory alloy.
-
It is not broken down by saliva.
-
It can be controlled by remote as to where the teeth move.
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It is very hard so the teeth cannot move.
Question 8
Question
Not really a proper question just useful info in the explanation. RAM stand for Relative Molecular mass
Answer
- True
- False
Question 9
Question
Gas chromatography uses ________, to help identify the substance.
Answer
-
The speed of the substance in column
-
The time taken to travel through the column
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The size of the substance
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The mass of the substance
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The number of substances
Question 10
Question
The gas chromatography column can be linked to a(n) __________, to identify the substances leaving the column.
Answer
-
Microscope
-
Oscilloscope
-
Set of accurate scales
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Mass spectrometer
Question 11
Question
Soluble salts can be made from:
Answer
-
Halogens
-
Metals
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Acids
-
Insoluble bases
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Oxygen
-
Alkalis
-
Water
Question 12
Question
Insoluble salts can be made by mixing appropriate solutions of _______ so that a(n) __________ is formed.
Answer
-
Acid(s)
-
Bases(s)
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Hydroxide(s)
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Alkali(s)
-
Precipitate
-
Gas
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Ions
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sodium hydroxide
Question 13
Question
Alkalis: (tick the correct statements)
Answer
-
Have a pH lower than 7
-
Turn UI green, blue and red.
-
Are also known as insoluble bases
-
Are also known as soluble hydroxides
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Are also known as insoluble hydroxides
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Can come in the form metal oxides
Question 14
Question
At the negative electrode, positively charged ions ________ electrons, this is known as _________.
Answer
-
Gain
-
Lose
-
Create
-
Neutralisation
-
Oxidation
-
Reduction
Question 15
Question
At the positive electrode, _________ charged ions _______ electrons, this is known as _________.
Answer
-
Negatively
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Positively
-
Gain
-
Lose
-
Neither decrease nor increase electrons
-
Oxidisation
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Reduction
-
Neutralisation
Question 16
Question
In electrolysis the positive electrode is usually made of ____________
Answer
-
Francium
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Steel
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Copper
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Boron
-
Iron
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Carbon
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Charcoal
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Plastic
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Wood
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