Q4 of 24 Page 77

When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates

when electric current is passed through a conducting solution, chemical reaction occurs in the solution due to which the solution changes its color.


Also heating, magnetic and lightning effect of current cannot produce color change in solution

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2

Boojho and Paheli performed experiments taking similar bulbs and cells but two different solutions A and B as shown in Fig.14.1.


They found that the bulb in the setup A glows more brightly as compared to that of the setup B. You would conclude that


 3

Boojho’s uncle has set up an electroplating factory near his village. He should dispose off the waste of the factory

 5

Which one of the following solutions will not conduct electricity?

 6

Which of the following metals is used in electroplating to make objects appear shining?