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iGCSE Chemistry Chapter 1 and 2 Flashcards | StudBud
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iGCSE Chemistry Chapter 1 and 2
iGCSE Chemistry Chapter 1 and 2
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iGCSE Chemistry States of Matter Elements, compounds and mixtures
Flashcards
23 cards
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Questions
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Answers
1
When two or more atoms are bonded together they form a:
Element
Mixture
Molecule
Compound
2
To calculate the R
f
value, you should do
(distance the water moved)/ (distance the dye moved)
(distance the dye moved)/ (length of the chromatogram)
(distance the dye moved)*(distance the water moved)
(distance the dye moved)/ (distance the water moved)
3
Atoms that have the same atomic number have:
The same number of electrons
The same number of protons
The same number of protons and neutrons
The same number of neutrons
4
If I have sea water and want to extract the salt I will use:
Filtration
Heating
Distallation
Evaporation
5
Atoms of the same element which have different mass numbers are called:
Cations
Anions
Allotropes
Isotopes
6
When the particles of a gas move apart to spread evenly throughout their container, they are:
Diffusing
Relocating
Condensing
Evaporating
7
When two or more atoms from different elements are bonded together they form a:
Molecule
Compound
Mixture
Element
8
If I have sea water and want to purify the water I will use:
Heating
Evaporation
Distallation
Filtration
9
When salt dissolves in water, the salt is the:
Solvent
Saturated solution
Solution
Solute
10
When we dissolve ethanol in water, the container will contain a:
Solution
Saturated solution
Solvent
Solute
11
When we have atoms and molecules in the same space which have not reacted chemically, they form
a mess
a molecule
a compound
a mixture
12
If I have a mixture of water and ethanol and want to separate them, I will use:
Distillation
Evaporation
Fractional distillation
Heating
13
When salt dissolves in water, the water is the:
Saturated solution
Solvent
Solution
Solute
14
The change of state from a solid so to a gas is:
Melting
Sublimation
Evaporating
Freezing
15
The change of state from a solid so to a liquid is:
Freezing
Sublimation
Melting
Evaporating
16
If I have sandy sea water and want to remove the sand I will use:
Fractional distallation
Filtration
Evaporation
Heating
17
The three states of matter are:
frozen, molten, evaporated
Earth, fire and water
solid, liquid and gas
Solid, liquid, vapour
18
If I have NH
3
at one end of a glass tube and HCl at the other, a white cloud forms. This shows:
That a reaction has taken place
That they were both concentrated
That It has become colder inside the glass tube
That NH3 and HCl don't react
19
When atoms have the same atomic number they:
Are the same element
Have the same number of neutrons
Can react with each other
Have the same mass
20
The change of state from a liquid so to a solid is:
Sublimation
Freezing
Melting
Evaporating
21
When a substance changes from a solid to a liquid, the particles will have:
more energy, move less freely, still touch mostly
the same energy, movement and arrangement doesn't change
less energy, move more freely, still touch mostly
more energy, move more freely, still touch mostly
22
Chromatography can be used to separate:
Salt and water
Different dyes
An ethanol and water mixture
Water and oil
23
The change of state from a gas so to a liquid is:
Freezing
Condensing
Melting
Evaporating
