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Q.

When BrO 3 −  Ion reacts with Br −  in acid medium B r 2  is liberated.  The equivalent mass of B r 2  in this reaction is


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a

4M 6   

b

5M 3  

c

5M 8  

d

3M 5  

answer is C.

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Detailed Solution

detailed_solution_thumbnail
2 BrO 3 − +12 H + +10 Br − →6Br2+6 H 2 O  10 mole of e‐ are required for formation of 6 moles of Br 2  
∴n-factor of B r 2 = 10 6 = 5 3  
 eq. wt. =  mol.wt.  n = m 5/3 = 3M 5    
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