Electroplating

The object to be electroplated is taken as ____________ electrode.

• cathode

• anode

• electrode

• none of these

When an electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates

• the chemical effect of current.

• the heating effect of current.

• the magnetic effect of current.

• the lightning effect of current.

which of the following is an application of electroplating.

• Electrorefining of metal

• extraction of metals from its ores

• to minimize the cost

• none of these

Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating?

• To increase acidity

•  To increase conductivity

• So that the colour becomes more prominent

•  To burn copper sulphate

Tags

NGSS.HS-PS1-5

To electroplate silver on Copper jewellery, the electrolyte that can be used is:

• Copper Sulphate

• Silver Nitrate

• Ammonium Chloride

• Sodium Chloride

Radhika wants to electroplate a plate with ZINC. She has a Zinc bar and the plate. But she does not know which should be the anode and which should be the cathode.

• Zinc Bar - Anode, Plate - Cathode

• Zinc Bar - Cathode, Plate - Anode

• Both Anode and Cathode should be Zinc

Tin cans used for storing food are made by electroplating

• copper on iron

• iron on tin

• tin on zinc

• tin on iron

Which of the following metals is used in electroplating to make objects appear shining?

• Iron

• Copper

• Chromium

• Aluminium

What is the primary purpose of electroplating?

• To protect the metal from corrosion

• To increase the weight of the metal

• To change the shape of the metal

• To make the metal magnetic

Tags

NGSS.HS-PS2-5

Which of the following metals is commonly used for electroplating to prevent rusting?

• Gold

• Silver

• Zinc

• Copper