Olympiad Test: Chemical Effects Of Electric Current - 1


10 Questions MCQ Test Science Olympiad Class 8 | Olympiad Test: Chemical Effects Of Electric Current - 1


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Attempt Olympiad Test: Chemical Effects Of Electric Current - 1 | 10 questions in 20 minutes | Mock test for Class 8 preparation | Free important questions MCQ to study Science Olympiad Class 8 for Class 8 Exam | Download free PDF with solutions
QUESTION: 1

A body can be charged by

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QUESTION: 2

Adding solute salt to water

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QUESTION: 3

Which of these is not true?

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QUESTION: 4

The gold-leaf electroscope is used to

Solution:

The gold leaf electroscope has been used by physicists for hundreds of years. It indicates the presence and nature of a charge through the application of charge to a metal top plate connected through a stem to two pieces of gold leaf. The movement of one piece of gold leaf away from the other shows that the electroscope is charged.

Hence, a gold leaf electroscope can detect the presence of charge and test the kind of charge.

QUESTION: 5

During electroplating, the metal on which electroplating is to be done should be

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QUESTION: 6

Chromium plating is done on objects like

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QUESTION: 7

The process of deposition of a layer of any desired metal on another metallic object by means of electricity is called

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QUESTION: 8

Which of these metals will you electroplate on iron to protect it from rusting and to make it shine?

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QUESTION: 9

The decomposition of an electrolyte on passing electric current is called

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QUESTION: 10

In which of these is current not conducted by electrons?

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