Chemical Effects of Electric Current
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Electrical Conductivity of Liquids
SubtopicElectrical Conductivity of Liquids under Chemical Effects of Electric Current for Grade 8 CBSE.
Preview questions (no answers)
- 1.
Which terminal of the battery is usually connected to the longer lead of an LED?
A.Negative
B.Positive
C.Neutral
D.Earth
- 2.
Is honey a good or poor conductor of electricity?
A.Good conductor
B.Poor conductor
C.Superconductor
D.It changes every minute
- 3.
Which of these is safe to use while handling electrical wires?
A.Iron tongs
B.Rubber gloves
C.Wet cloth
D.Copper pliers without insulation
Download the worksheet for Chemical Effects of Electric Current - Electrical Conductivity of Liquids to practice offline. It includes additional chapter-level practice questions.
Chemical Changes during Electrolysis
SubtopicChemical Changes during Electrolysis under Chemical Effects of Electric Current for Grade 8 CBSE.
Preview questions (no answers)
- 1.
A student performs an activity by inserting two copper wires connected to a battery into a fresh potato. After some time, a greenish-blue spot is observed around the wire connected to the positive terminal. This change is a clear demonstration of the:
A.Magnetic effect of electric current
B.Heating effect of electric current
C.Chemical effect of electric current
D.Static effect of electric current
- 2.
Which of the following is a result of the chemical effect of electric current?
A.A glowing filament in a bulb
B.A rotating motor
C.Gas bubbles at the anode
D.Heating of a geyser
- 3.
In a copper sulphate solution experiment, which electrode loses copper?
A.The cathode
B.The anode
C.Both electrodes
D.The battery
Download the worksheet for Chemical Effects of Electric Current - Chemical Changes during Electrolysis to practice offline. It includes additional chapter-level practice questions.
Process and Applications of Electroplating
SubtopicProcess and Applications of Electroplating under Chemical Effects of Electric Current for Grade 8 CBSE.
Preview questions (no answers)
- 1.
Is the process of electroplating used for purifying metals?
A.Yes, it is a common application
B.No, it is only for decoration
C.No, it is only for making magnets
D.Yes, but only for plastic
- 2.
Which of the following is used for electroplating to prevent corrosion of iron?
A.Oxygen
B.Nitrogen
C.Zinc
D.Sulphur
- 3.
What happens to the copper atoms when they reach the cathode during copper plating?
A.They turn into gas
B.They gain electrons and become copper metal
C.They dissolve into the solution
D.They disappear
Download the worksheet for Chemical Effects of Electric Current - Process and Applications of Electroplating to practice offline. It includes additional chapter-level practice questions.