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1.
Tin cans, used for storing food, are made by electroplating tin onto iron. Why?
2.
Some liquids are good conductors of electricity and some are poor conductors. Which one is a poor conductor?
3.
The process of depositing a layer of any desired metal on another material by means of electricity is called ___________.
4.
Chromium plating is done on many objects such as car parts, bath taps, kitchen gas stove etc. Why?
5.
A coating of _________is deposited on iron to protect it from corrosion and formation of rust
6.
Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating?
7.
When electrodes are immersed in water and electricity passed, the bubbles formed on the negative terminal is actually _______ gas.
8.
When electrodes are immersed in water and electricity passed, the bubbles formed on the positive terminal is actually _______ gas.
9.
Tap water is a good conductor of electricity while distilled water is not because
10.
In LEDs, the longer lead (wire) is always connected to the _______ terminal