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100 ml of sample of water requires 3.92 ...

100 ml of sample of water requires 3.92 mg of `K_2 Cr_2O_3` in presence of `H_2SO_4` for the oxidation of dissolved organic matter present in it. The COD of the water sample in ppm

A

`3.1`

B

`6.4`

C

`12.4`

D

`8.2`

Text Solution

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The correct Answer is:
B
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