MEDIUM
8th CBSE
IMPORTANT
Earn 100

Ajay bought a bottle that was labelled as distilled water. He suspected it to be tap water. What test he could use without adding any chemicals to it to find out for sure?

Important Questions on Chemical Effects of Electric Current

MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 14 - Chemical Effects of Electric Current>ASSESSMENT ZONE>Q F
Differentiate between conductors and insulators.
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 14 - Chemical Effects of Electric Current>ASSESSMENT ZONE>Q F
How does the tap water conduct electric current through it?
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 14 - Chemical Effects of Electric Current>ASSESSMENT ZONE>Q F
Why are the handles of electrical irons made of plastic or bakelite?
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 14 - Chemical Effects of Electric Current>ASSESSMENT ZONE>Q F
Define electrical conductivity. How does the electrical conductivity of water vary with impurities?
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 14 - Chemical Effects of Electric Current>ASSESSMENT ZONE>Q F
A copper vessel is to be electroplated with silver. Name the anode, cathode and the electrolyte you will use for this purpose. Draw a labelled sketch of the experimental set-up used for this purpose.
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 14 - Chemical Effects of Electric Current>ASSESSMENT ZONE>Q F
Some materials are classified as poor conductors of electricity. They allow electricity to pass under certain conditions. Explain with help of an example.
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 14 - Chemical Effects of Electric Current>ASSESSMENT ZONE>Q F
Why does the blue colour of copper chloride fade away gradually during electrolysis?