11564853
Descripción
Test por Jeffrey Piggott, actualizado hace más de 1 año
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Creado por Jeffrey Piggott
hace más de 6 años
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Pregunta 1
Pregunta
Which of the following is a chemical change?
Respuesta
Pregunta 2
Pregunta
A molecule is:
Respuesta
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the smallest particle that can exist.
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the smallest particle of an element that can exist.
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two or more atoms chemically joined together.
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the same as an atom.
Pregunta 3
Pregunta
When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution?
Respuesta
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the solution becomes more concentrated the longer it is boiled.
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the boiling point decreases the longer the solution is boiled.
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the freezing point is higher than pure water.
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the boiling point is lower than pure water.
Pregunta 4
Pregunta
Which method of separation is best to use for checking which ink was used in a fake cheque?
Respuesta
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1 filtration
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2 crystallisation
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3 distillation
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4 chromatography
Pregunta 5
Pregunta
Which method of separation is best to use for removing mud in muddy water?
Respuesta
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1 Filtration
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2 Crystallisation
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3 Distillation
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4 Chromatography
Pregunta 6
Pregunta
Which order of the three words matches the three substances salt, sodium, seawater ?
Respuesta
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compound, element, mixture
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mixture, compound, element
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element, compound, mixture
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element, mixture, compound
Pregunta 7
Pregunta
Which is the best way to get the salt back from some salty water?
Respuesta
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Sieving
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Using a magnet
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Letting the water evaporate
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Filtering
Pregunta 8
Pregunta
The best way to separate sand from iron filings is:
Respuesta
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adding water and then filtering
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using a magnet
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filtering
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sieving
Pregunta 9
Pregunta
Name the PROCESS you would use to obtain a sample of SOLID SALT from some sea water
Respuesta
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Filtration
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Electrolysis
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Evaporation
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Distillation
Pregunta 10
Pregunta
A boy dissolved some salt in warm water. What do we call the resulting mixture?
Respuesta
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a filtrate
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a solution
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a solute
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a solvent
Pregunta 11
Pregunta
What process would be used to obtain the solvent from a solution?
Respuesta
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Chromatography
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Distillation
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Filtration
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Evaporation
Pregunta 12
Pregunta
Which of the following would you use filtration for?
Respuesta
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Separating the solute from a solution
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Making a solution more concentrated
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Separating a suspension from a solution
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Separating the solvent from a solution
Pregunta 13
Pregunta
Put the following processes into the correct order if you wished to obtain pure salt from rock salt.
Respuesta
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1. Evaporate the water 2. Dissolve the salt in water 3. Filter the solution
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1. Dissolve the salt in water 2. Filter the solution 3. Evaporate the water
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1. Filter the solution 2. Dissolve the salt in water 3.Evaporate the water
Pregunta 14
Pregunta
After filtering a mixture what do we call the liquid that drips through the filter paper?
Respuesta
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Distillate
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Filtrate
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Residue
Pregunta 15
Pregunta
Crude oil can be separated into different substances using what method of separation?
Respuesta
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Fractional distillation
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Chromatography
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Simple distillation
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Filtration
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