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Redox Reactions — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryRedox Reactions2 Marks
Question
  1. Write the functions of salt bridge in electro chemical cell.
  2. Give one decomposition reaction which is redox reaction and one which is a redox reaction.
✓

Answer

  1. Salt bridge.
  1. Completes internal circuit.
  2. It maintains electroneutrality.
  1.  
  1.  $\stackrel{{+4}}{\hbox{C}\text{a}}\stackrel{{-2+2}}{\hbox{CO}_3}(\text{s})\xrightarrow{\ \ \ \ \ \ \ \ }\stackrel{{+2}}{\hbox{Ca}}\stackrel{{-2}}{\hbox{O}}(\text{s})+\stackrel{{+4-2}}{\hbox{CO}_2}\text{(g)}$

It is not a redox reaction.

  1. $\stackrel{{+2+6}}{\hbox{Fe}}\stackrel{{-2}}{\hbox{SO}_4}\xrightarrow{\ \ \ \Delta \ \ \ \ \ }\stackrel{+3}{\hbox{Fe}}\stackrel{-2}{\hbox{O}_3}+\stackrel{{_-2}}{\hbox{SO}_2}+\stackrel{{+6-2}}{\hbox{SO}_3}$ 

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