2772995
Descripción
Test por ellamay947, actualizado hace más de 1 año
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Creado por ellamay947
hace alrededor de 9 años
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Pregunta 1
Pregunta
Tick the boxes by the chemical changes.
Respuesta
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boiling water in an electric kettle
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burning petrol in a car engine
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diluting orange juice with water
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making aluminium cans from a block of aluminium metal
Pregunta 2
Pregunta
John dropped a glass bottle of blue copper sulphate crystals. The bottle broke and the glass mixed with the crystals. Suggest how John or a teacher could clear up the mixture safely, without cutting themselves.
Respuesta
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Add water so the crystals dissolve, sweep up the glass and mop up the water.
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Sweep up the mixture and put in bin.
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Add acid so the mixture dissolves and mop it up.
Pregunta 3
Pregunta
Marie mixed 5g of carbon with 5g of lead oxide. She heated the mixture strongly for 15 minutes in a fume cupboard. After 15 minutes, Marie found some shiny beads in the mixture. How should Marie test to see if the beads are metal and if they are metal, what metal are they most likely to be?
Respuesta
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Check if the beads are sonorous and carbon.
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Check if the beads are sonorous and magnesium.
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See if they conduct heat or electricity and magnesium.
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See if they conduct heat or electricity and lead.
Pregunta 4
Pregunta
In Marie's experiment, where, apart from the air, did oxygen come from?
Respuesta
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The Bunsen Burner
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The lead oxide.
Pregunta 5
Pregunta
What is the name of the compound made when magnesium reacts with sulphur?
Respuesta
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magnesium sulphate
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magnesium oxide
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magnesium sulphide
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magnesium oxate
Pregunta 6
Pregunta
What is the process in which you break down a substance using heat?
Respuesta
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reduction
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oxidation
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thermal decomposition
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combustion
Pregunta 7
Pregunta
Select the word equation for the reaction between magnesium and oxygen.
Respuesta
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magnesium + crucible = magnesium oxide
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magnesium + oxygen = magnesium oxidate
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magnesium + oxygen = magnesium oxide
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