Class 8 Science Chapter 14 MCQ

Class 8 Science Chapter 14 MCQ (Multiple Choice Questions) of Chemical Effects of Electric Current updated for new academic session 2021-2022. These multiple choice objective quiz will help the students in the preparation of school tests and terminal exams.

Prepare the entire chapter 14 of class 8 science using these objective questions with answers. All the questions are important as well as useful for a student of standard 8. These questions are prepared from the class 8 science chapter 14 NCERT Textbook only.

Class 8 Science Chapter 14 MCQ for 2021-2022

Class: 8Science
Chapter: 14Chemical Effects of Electric Current
Contents: MCQ Online Tests with Explanation

MCQ Tests with Answers for Class 8 Science Chapter 14

Q1

Boojho and Paheli performed experiment taking similar bulbs and cells but two different solution A and B respectively. They found that the bulb in the set-up A glows more brightly as compared to that of the set of B. You would conclude that:

[A]. Higher current is flowing through the circuit in setup A.
[B]. Higher current is flowing through the circuit in setup B.
[C]. Equal current is flowing through both the circuits.
[D]. The current flowing through the circuits in the two setups cannot be compared in this manner.
Q2

In a science quiz competition, Payel is asked a question where she had to choose the statement which was/were correct?

[A]. A strong electrolyte is a liquid or solution which conducts electricity very well.
[B]. A weak electrolyte is a liquid or solution which conducts electricity to a lesser extent.
[C]. A solid electrical conductor through which an electric current enters or leaves something like a dry cell, is called an electrode.
[D]. All the above
Q3

Which of the following metals are produced by the electrolysis of their molten compounds?

[A]. Copper and Silver
[B]. Silver and Aluminium
[C]. Aluminium and Sodium
[D]. Sodium
Q4

Badal appeared in class test but he confused to know the correct statement. Would you help him to know that?

[A]. Due to the presence of small amount of acids, rain water becomes a conductor of electricity.
[B]. Sea water is a much better conductor of electricity than drinking water.
[C]. We should never operate an electric switch or touch any working electrical appliances with wet hands.
[D]. All the above




Q5

Which one of the following solutions will not conduct electricity?

[A]. Lemon juice
[B]. Vinegar
[C]. Tap water
[D]. Vegetable oil
Q6

Which of the following is a weak electrolyte?

[A]. Carbonic acid
[B]. Sodium hydroxide
[C]. Copper sulphate
[D]. Nitric acid




Q7

Non-metals are generally non-conductors of electricity. The non-metal whose one of the forms can be used to make electrodes in electrolysis experiments is:

[A]. [A] Iodine
[B]. Carbon
[C]. Silicon
[D]. Phosphorus
Q8

If there is a solution. But which of the following solutions will not make the bulb glow:

[A]. Sodium chlorides
[B]. Copper sulphate
[C]. Silver nitrate
[D]. Sugar solution in diluted water




Q9

Which of the following effects is not produced by the chemical reactions of brought about by an electric current?

[A]. Bubbles of gases on electrodes
[B]. Deposits of metals on electrode
[C]. Change in color of solution
[D]. Formation of a precipitate
Q10

If plus sign (+) denotes the positive electrode and minus sign (-) denotes the negative electrode, then which of the following statement is correct for an iron spoon to be copper plated?

[A]. Iron spoon (+), copper plate (-), Iron sulphate electrolyte
[B]. Iron spoon (-), copper plate (+), Iron sulphate electrolyte
[C]. Copper plate (-), Iron spoon (+), Copper sulphate electrolyte
[D]. Copper plate (+), Iron spoon (-), Copper sulphate electrolyte

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