15027302
Descripción
Test por Jeffrey Piggott, actualizado hace más de 1 año
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Creado por Jeffrey Piggott
hace alrededor de 6 años
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Pregunta 1
Pregunta
The diagram shows a section of an overhead power cable.
Which statement explains why a particular substance is used?
Image:
O1 (binary/octet-stream)
Respuesta
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A Aluminium has a low density and is a good conductor of electricity.
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B Ceramic is a good conductor of electricity.
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C Steel can rust in damp air.
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D Steel is more dense than aluminium.
Pregunta 2
Pregunta
The diagram shows the electrolysis of concentrated hydrochloric acid and concentrated aqueous sodium chloride using carbon electrodes.
At which electrode(s) is hydrogen produced?
Image:
Q2 (binary/octet-stream)
Respuesta
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A electrode 1 only
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B electrodes 1 and 3
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C electrode 2 only
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D electrodes 2 and 4
Pregunta 3
Pregunta
What are the electrode products when molten silver iodide is electrolysed between inert electrodes?
Image:
Q3 (binary/octet-stream)
Respuesta
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A
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B
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C
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D
Pregunta 4
Pregunta
Copper and hydrogen can each be formed by electrolysis.
At which electrodes are these elements formed?
Image:
Q4 (binary/octet-stream)
Respuesta
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A
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B
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C
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D
Pregunta 5
Pregunta
The diagram shows a failed attempt to copper-plate a pan.
Which action will plate the pan with copper?
Image:
Q5 (binary/octet-stream)
Respuesta
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A cooling the copper sulfate solution in an ice bath
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B heating the copper sulfate solution to boiling point
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C increasing the voltage from 3 V to 6 V
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D making the pan the cathode and the copper the anode
Pregunta 6
Pregunta
The diagram shows the electroplating of a steel object.
A student made the following statements.
1 The object turns a reddish-brown colour.
2 The copper sulfate solution changes to a paler blue colour.
3 The copper electrode becomes smaller.
Which statements are correct?
Image:
Q6 (binary/octet-stream)
Respuesta
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A 1, 2 and 3
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B 1 and 2 only
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C 1 and 3 only
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D 2 and 3 only
Pregunta 7
Pregunta
The diagram shows an electrolysis experiment.
During the electrolysis, sodium was formed at electrode P and chlorine at electrode Q.
Which row correctly identifies P, Q and X?
Image:
Q7 (binary/octet-stream)
Respuesta
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A
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B
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C
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D
Pregunta 8
Pregunta
The diagram shows apparatus for plating a spoon with silver.
Which statement is not correct?
Image:
Q6 (binary/octet-stream)
Respuesta
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A Silver would stick to the spoon because it is a very reactive metal.
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B The electrolyte would be a silver salt dissolved in water.
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C The metal electrode would be made from silver.
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D The spoon would be connected to the negative terminal of the power supply.
Pregunta 9
Pregunta
Which metal could not be used for electroplating by using an aqueous solution?
Respuesta
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A chromium
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B copper
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C silver
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D sodium
Pregunta 10
Pregunta
Which products are formed at the electrodes when a concentrated solution of sodium chloride is electrolysed?
Image:
Q8 (binary/octet-stream)
Respuesta
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A
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B
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C
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D
Pregunta 11
Pregunta
A student wishes to electroplate an object with copper.
Which row is correct?
Image:
Q11 (binary/octet-stream)
Respuesta
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A
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B
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C
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D
Pregunta 12
Pregunta
In the electrolysis shown, chlorine is produced at W and sodium at X.
Which labels are correct?
Image:
Q13 (binary/octet-stream)
Respuesta
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A
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B
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C
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D
Pregunta 13
Pregunta
Which substance will not conduct electricity?
Respuesta
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A aluminium
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B copper
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C plastic
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D steel
Pregunta 14
Pregunta
Electrical cables are made from either ……1……, because it is a very good conductor of
electricity, or from……2……, because it has a low density.
Overhead cables have a ……3…… core in order to give the cable strength.
Which words correctly complete gaps 1, 2 and 3?
Image:
Q15 (binary/octet-stream)
Respuesta
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A
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B
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C
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D
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