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Q.

In Carius method of estimation of halogen. 0.45 g of an organic compound gave 0.36 g of AgBr. Find out the percentage of bromine in the compound.

(Molar masses : AgBr = 188 g mol-1 : Br = 80 g mol-1)

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a

34.04%

b

40.04%

c

36.03%

d

38.04%

answer is A.

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Detailed Solution

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Mass of organic compound = 0.45 gm

Mass of AgBr obtained = 0.36 gm

∴ Moles of AgBr=0.36188

∴ Mass of Bromine=0.36188×80=0.1532 gm

∴ % Br in compound=0.15320.45×100=34.04 %

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