0654 Electricty & Chemistry Quiz

The diagram shows a section of an overhead power cable.
Which statement explains why a particular substance is used?

The diagram shows the electrolysis of concentrated hydrochloric acid and concentrated aqueous sodium chloride using carbon electrodes.

At which electrode(s) is hydrogen produced?

What are the electrode products when molten silver iodide is electrolysed between inert electrodes?

Copper and hydrogen can each be formed by electrolysis.
At which electrodes are these elements formed?

The diagram shows a failed attempt to copper-plate a pan.

Which action will plate the pan with copper?

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?

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?

The diagram shows apparatus for plating a spoon with silver.

Which statement is not correct?

Which products are formed at the electrodes when a concentrated solution of sodium chloride is electrolysed?

A student wishes to electroplate an object with copper.
Which row is correct?

In the electrolysis shown, chlorine is produced at W and sodium at X.

Which labels are correct?

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?