Answers

2016-01-02T17:57:50+05:30
Case 1 is right because a proton is 1837 times heavier than a electron and there fore cannot move as the electrons do  
0
need more information in a elaborated way
2016-01-03T13:18:53+05:30
Actually electrons are the ones which are responsible for the changes thus case 1 can be said right
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only for chemical changes
i asked in simple circuit protons move or not
NO 
then they say +ve ions move from high to low potential