Test Details

Chemical Effects of Electric Current

Feb 02, 10:25 PM

60 minutes

Feb 16, 12:00 PM

30.0 marks

MCQ

20 questions

Himanshi sharma

name-himanshi sharma

Class Details

All Subjects

Maths

Science

English

Language

Hindi

Computer

Social Science

Reasoning

Class 8

All Subjects

Maths

Science

English

Language

Hindi

Computer

Social Science

Reasoning

class 8 group for work

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Question Text

Question 1 :
When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates<br>

Question 2 :
The passage of an electric current through a conducting solution causes :

Question 3 :
When $1F$ of electricity is passed through acidulated water, ${O}_{2}$ evolved is:

Question 4 :
Tin cans used for storing food, are made by electroplating tin onto :

Question 5 :
The greenish blue colour spot on the potato is useful in identifying :

Question 7 :
Boojhos uncle has set up an electroplating factory near his village. He should dispose off the waste of the factory<br>

Question 8 :
A coating of zinc is deposited on iron to protect it from __________.

Question 9 :
Which one of the following scientists showed that if electrodes are immersed in water and a current was passed, bubbles of oxygen and hydrogen were produced?

Question 10 :
The electrical process of coating an inexpensive conductor with a metal is called electroplating.

Question 11 :
Which of the following metal is used in electroplating, in order to bring a shine to the objects?

Question 12 :
_________ plating is done on objects such as car parts, bath taps, kitchen gas burners, bicycle handlebars, wheel rims because of its shiny appearance

Question 14 :
A gas with formula $C_nH_{2n+2}$ diffuses through the porous plug at a rate one-sixth of the rate of diffusion of hydrogen gas under similar conditions. The formula of gas is?

Question 17 :
As long as an electron is in a particular orbit, the electron can never lose its energy on its own.

Question 19 :
A tester is used to check the conduction of electricity through two liquids, labeled $A$ and $B$. It is found that the bulb of the tester glows brightly for liquid $A$ while it glows very dimly for liquid $B$. You would conclude that:<br/>

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