Test: Chemical Effects Of Electric Current - 4


20 Questions MCQ Test Class 8 Science by VP Classes | Test: Chemical Effects Of Electric Current - 4


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This mock test of Test: Chemical Effects Of Electric Current - 4 for Class 8 helps you for every Class 8 entrance exam. This contains 20 Multiple Choice Questions for Class 8 Test: Chemical Effects Of Electric Current - 4 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Chemical Effects Of Electric Current - 4 quiz give you a good mix of easy questions and tough questions. Class 8 students definitely take this Test: Chemical Effects Of Electric Current - 4 exercise for a better result in the exam. You can find other Test: Chemical Effects Of Electric Current - 4 extra questions, long questions & short questions for Class 8 on EduRev as well by searching above.
QUESTION: 1

Plastic wire is

Solution: Plastic wire is an insulator because it doesn't conduct heat.
QUESTION: 2

Electroplating is based on:

Solution:
QUESTION: 3

Adding common salt to distilled water makes it:

Solution:
QUESTION: 4

An electrolyte is:

Solution:
QUESTION: 5

Copper wire is a:

Solution:
QUESTION: 6

Poor conductors are

Solution:
QUESTION: 7

Distilled water is

Solution:

Distilled water is a poor conductor  of electricity because it doesn't contain any dissolved salts in it which can provide it ions to conduct electricity.

QUESTION: 8

 Flow of electrons is called

Solution:

Electricity is a term used to describe the energy produced (usually to perform work) when electrons are caused to directional (not randomly) flow from atom to atom. In fact, the day-to-day products that we all benefit from, rely on the movement of electrons. This movement of electrons between atoms is called electrical current. 

QUESTION: 9

 Electroplating prevents

Solution:
QUESTION: 10

An electric lamp glows due to

Solution: When electric current passes through a bulb, the filament of the bulb heats up to a high temperature. This is called heating effect of current. The temperature is so high that it starts glowing. 

However, if the current through a circuit is weak, the filament does not get heated up sufficiently and it does not glow. 
QUESTION: 11

Plastics are the good conductor of electricity.

Solution:
QUESTION: 12

Flow of electrons is called electric current.

Solution:
QUESTION: 13

Distilled water also conducts the electric current.

Solution: Distilled water which is a pure form of water, is neither acidic nor basic in nature. So distilled water does not dissociate into ions. Since, conduction of electricity requires free ions so, distilled water does not conduct electricity.
QUESTION: 14

Circuit is the closed path through which current flows.

Solution:

The correct option is A.
circuit A path through which electric charges flow. A continuous, unbroken path through which electrons can flow is a closed circuit. Charges, or current, can flow only through a closed circuit. A break or opening in a circuit creates an open circuit.

QUESTION: 15

 Electric bulb glows due to chemical effect of electricity.

Solution:

The electric bulb has a filament called tungsten when electricity passes through this filament, it heats up and glows. This heat is generated due to the passage of electric current and the drift of electrons due to the current and the resistance it causes.
Hence, the glowing of electric bulb is based on the heating effect of electric current.

QUESTION: 16

Copper wire is poor conductor of electricity.

Solution:
QUESTION: 17

 LED is an electric bulb which is used in a tester.

Solution:
QUESTION: 18

 Electricity shows magnetic effect

Solution:
QUESTION: 19

When salt is dissolved in distilled water, it does not conduct electricity.

Solution:
QUESTION: 20

Electroplating  is  based  on  the  heating  effect  of  electricity.

Solution:

The process of depositing a thin layer of a desired metal over a metal object with the help of electric current is called electroplating. So, Electroplating is based on chemical effect of electricity.