chemical effects of eletric current

Which one is the polluting waste generated by electroplating factories?

• Used up electrodes

• Electrolytes

• Corroded Metals

When acidified water is electrolysed using carbon electrodes. What is produced at (+) and (-) electrodes.

• (+) - Oxygen; (-) - Hydrogen

• (+) - Oxygen; (-) - Carbon

• (+) - Hydrogen (-) - Oxygen

LED stands for

(a)  

Select the poor conductors of electricity

• Honey

• Plastic

• Vinegar

• Distilled Water

We can electroplate plastic on iron.

• True

• False

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

• Copper Sulphate

• Silver Nitrate

• Ammonium Chloride

• Sodium Chloride

In a conducting liquid electricity is conducted with the help of :

• Proton

• Neutron

• Electron

• Ions

During electrolysis the positively charged ions travel towards Cathode.

• True

• False

During electroplating ________ (electrode) reduces in size and ________(electrode) increases in size.

(a)  

Bicycle bells and wheel rims are electroplated with which metal?

• Tin

• Nickle

• Chromium

• Silver