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20 questions
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
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.
Bicycle bells and wheel rims are electroplated with which metal?
Tin
Nickle
Chromium
Silver
The element in a kettle or toaster act as a large resistor
True
False
The filament in this light bulb offers high resistance, thereby producing...(select all that apply)
Heat
Light
Sound
potential glow
A short circuit has the following:
Wires connected across the battery
No wires across the battery
Components that don't work, eg. a light bulb
The following diagram is that of an .....
electro circuit
electro nail
electromagnet
magnetic cell
Which of the following can make an electromagnet stronger? (select all that apply)
Increasing the number of turns of wire around the nail/core
increasing the number of cells
decreasing the number of cells used
Name a component that can be added to an electromagnet to turn on and off the magnetic field.
The breaking down of a substance into its component elements by passing an electric current through it is called...
thermal decomposition
electrolysis
electrical breakdown
Copper chloride solution is broken down by electrolysis. On which electrode are the Chlorine ions deposited on? Positive anode OR negative cathode.
The negatively charged electrode is called the _____
Anode
Cathode
The following diagram is that of an .....
electro circuit
electro nail
electromagnet
magnetic cell
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