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