MEDIUM
8th CBSE
IMPORTANT
Earn 100

Mercury is a liquid and conducts electricity. Do you think it is an electrolyte?

Important Questions on Chemical Effects of Electric Current

EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q 3
Solid copper sulphate does not conduct electricity, but when it is dissolved in water, it does conduct electricity. Why?
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q 4
Copper conducts electricity through electrons, whereas salt solution conducts electricity through ions. Do you agree?
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q 5
Why should you not touch electrical appliances with wet hands?
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q 6
After electroplating a metal spoon with copper, a student interchanged the connections of the copper plate and the spoon. What do you think will happen now?
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q 7
We should not try to put out a fire in an electrical appliance by pouring water on it. Why?
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q 8
Instead of taking the trouble of electroplating metals with chromium for making car parts, taps, cycle parts, etc., why are these objects not made of chromium itself?