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Q.

Atomic weight of barium is 137 .34. The equivalent weight of barium in BaCrO4 used as an oxidising agent in acid medium is

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a

114.45

b

137.34

c

68.67

d

45.78

answer is B.

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Detailed Solution

CrO42- (and not Ba2+)  is involved  as an oxidising agent and reduced to Cr3+, hence, Ew = Mw3
 

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