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