CBSE Class 8 Science Chemical Effect of Electric Current MCQs

Refer to CBSE Class 8 Science Chemical Effect of Electric Current MCQs provided below. CBSE Class 8 Science MCQs with answers available in Pdf for free download. The MCQ Questions for Class 8 Science with answers have been prepared as per the latest syllabus, CBSE books and examination pattern suggested in Class 8 by CBSE, NCERT and KVS. Multiple Choice Questions for Chapter 14 Chemical Effects of Electric Current are an important part of exams for Class 8 Science and if practiced properly can help you to get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 8 Science and also download more latest study material for all subjects

MCQ for Class 8 Science Chapter 14 Chemical Effects of Electric Current

Class 8 Science students should refer to the following multiple-choice questions with answers for Chapter 14 Chemical Effects of Electric Current in Class 8. These MCQ questions with answers for Class 8 Science will come in exams and help you to score good marks

Chapter 14 Chemical Effects of Electric Current MCQ Questions Class 8 Science with Answers

Chapter 14

CHEMICAL EFFECT OF ELECTRIC CURRENT

 

Question. In LEDs, the longer lead (wire) is always connected to the _______ terminal
a) negative
b) neutral
c) positive
d) Any terminal

Answer: C

 

Question. Tap water is a good conductor of electricity while distilled water is not because
a) Tap water contain salts
b) Distilled water do not contain salt
c) Only a) is correct
d) Both a & b is correct

Answer: D

 

Question. When electrodes are immersed in water and electricity passed, the bubbles formed on the positive terminal is actually _______ gas.
a) Hydrogen
b) Carbon di oxide
c) Oxygen
d) Nitrogen

Answer: C

 

Question. When electrodes are immersed in water and electricity passed, the bubbles formed on the negative terminal is actually _______ gas.
a) Hydrogen
b) Carbon di oxide
c) Oxygen
d) Nitrogen

Answer: A

 

Question. Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating?
a) To increase acidity
b) To increase conductivity
c) So that the colour becomes more prominent
d) To burn copper sulphate

Answer: B

 

Question. A coating of _________is deposited on iron to protect it from corrosion and formation of rust
a) copper
b) aluminium
c) Zinc
d) silver

Answer: C

 

Question. Chromium plating is done on many objects such as car parts, bath taps, kitchen gas stove etc. Why?
a) It does not corrode but prevents scratches
b) It looks beautiful
c) It costs less
d) Articles can be sold at higher price

Answer: A

 

Question. The process of depositing a layer of any desired metal on another material by means of electricity is called ___________.
a) Electric plating
b) Electroplating
c) Electric depositing
d) None of the above

Answer: B

 

Question. Some liquids are good conductors of electricity and some are poor conductors. Which one is a poor conductor?
a) Acidic solution
b) Alkaline solution
c) Common Salt solution
d) Distilled water

Answer: D

 

Question. Tin cans, used for storing food, are made by electroplating tin onto iron. Why?
a) Tin gives a shiny appearance
b) To make the vessel cheap
c) Tin is less reactive than iron.
d) To make the vessel lighter

Answer: C

 

Question: Plastic wire is

a) An insulator

b) A conductor

c) An insulator and a conductor

d) None of the options

Answer: A 

 

Question: An electric lamp glows due to

a) Heating effect

b) Chemical effect

c) Magnetic effect

d) None

Answer: A

 

Question: Electroplating prevents

a) Rusting

b) Current

c) Chemical effect

d) All

Answer: A

 

Question: Flow of electron is called

a) Electric current

b) Electroplating

c) Electrodes

d) Electrolyte

Answer: A

 

Question: Distilled water is

a) Poor conductor

b) Good conductor

c) Poor conductor and good conductor

d) None

Answer: A

 

Question: Poor conductors are

a) All of these

b) Plastics

c) Clothes

d) Wood

Answer: A

 

Question: Copper wire is a

a) Good conductor

b) Poor conductor

c) Good conductor and poor conductor

d) None of the options

Answer: A

 

Question: An electrolyte is

a) A liquid that conducts current

b) A metal

c) A solution

d) All of these

Answer: A

 

Question: Adding common salt to distilled water makes it

a) Good conductor

b) Insulator

c) No

d) Both Good conductor and Insulator

Answer: A

 

Question: Electroplating is based on

a) Chemical effect of electricity

b) Magnetic effect of electricity

c) Heating effect of electricity

d) Physical effect of electricity

Answer: A

 

Question. The pure piece of metal which is used to be plated, is made the
(a) anode
(b) cathode
(c) nematode
(d) posit rode

Answer : A

Question. Which of the following solutions is a good conductor of electricity?
(a) Glucose solution
(b) Lemon juice
(c) Alcohol solution
(d) Distilled water
(d) Vegetable oil

Answer : B

Question. A sheet of pure copper is used as
(a) cathode
(b) anode
(c) positrode
(d) negatrode

Answer : A

Question. Which of the following non-metals can be electroplated with copper?
(a) Sodium
(b) Iodine
(c) Silicon
(d) Carbon
(e) Phosphorus

Answer : D

Question. Which of the following is not used for electroplating any metal?
(a) Gold
(b) Silver
(c) Sodium
(d) Nickel
(e) Copper

Answer : C

Question. Copper wire is a
(a) Good conductor
(b) Poor conductor
(c) Both a and b
(d) None of this
 
Answer : A
 
Question. Iron objects can be protected by electroplating them with
(a) chromium
(b) nickel
(c) zinc
(d) all of these
 
Answer : D
 
Question. The substance which is conductor of electricity is:
(a) rubber
(b) paper
(c) nails
(d) plastic
 
Answer : C
 
Question. Which of the following is a good conductor of electricity:
(a) istilled water
(b) tap water
(c) kerosene
(d) none of these
 
Answer : B
 
Question. Which of the following does not conduct electricity?
(a) Sugar solution
(b) Vinegar solution
(c) Lemon juice solution
(d) Caustic soda solution
 
Answer : A
 
Question. Magnetic compass connected In a circuit is used to check:
(a) magnetism in electric current
(b) slow current
(c) small current
(d) none of these
 
Answer : C
 
Question. Waste from an electroplating factory must be disposed off
(a) in the nearby river
(b) in the nearby pond
(c) in the nearby cornfield
(d) according to the disposal guidelines of Waste Management Bodies
 
Answer : D
 
Question. The cans, used for storing food, are made by electroplating ……………. on to irons
(a) chromium
(b) zinc
(c) tin
(d) none of these
 
Answer : C
 
Question. Adding lime water to tap water makes it:
(a) an electrolyte
(b) electrolysis
(c) no change occur
(d) none of these
 
Answer : A
 
Question. Waste from an electroplating factory must be disposed off
(a) in the nearby river
(b) in the nearby pond
(c) in the nearby cornfield
(d) according to the disposal guidelines of Waste Management Bodies
 
Answer : D

 

Chapter 01 Crop Production and Management
CBSE Class 8 Science Crop Production and Management MCQs
Chapter 02 Microorganisms Friend or Foe
CBSE Class 8 Science Microorganisms Friend or Foe MCQs
Chapter 03 Synthetic Fibres and Plastics
CBSE Class 8 Science Synthetic Fibre and Plastics MCQs
Chapter 04 Materials Metals and Non Metals
CBSE Class 8 Science Materials Metals and Non Metals MCQs
Chapter 05 Coal and Petroleum
CBSE Class 8 Science Coal and Petroleum MCQs
Chapter 06 Combustion and Flame
CBSE Class 8 Science Combustion and Flame MCQs
Chapter 07 Conservation of Plants and Animals
CBSE Class 8 Science Conservation of Plants and Animals MCQs
Chapter 08 Cell Structure and Functions
CBSE Class 8 Science Cell Structure and Functions MCQs
Chapter 09 Reproduction in Animals
CBSE Class 8 Science Reproduction in Animals MCQs
Chapter 10 Reaching the Age of Adolescence
CBSE Class 8 Science Reaching The Age of Adolescence MCQs
Chapter 11 Force and Pressure
CBSE Class 8 Science Force and Pressure MCQs
Chapter 14 Chemical Effects of Electric Current
CBSE Class 8 Science Chemical Effect of Electric Current MCQs
Chapter 15 Some Natural Phenomena
CBSE Class 8 Science Some Natural Phenomena MCQs
Chapter 17 Stars and The Solar System
CBSE Class 8 Science Stars and Solar System MCQs
Chapter 18 Pollution of Air and Water
CBSE Class 8 Science Pollution of Air and Water MCQs

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