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For the estimation of nitrogen, 1.4 g of...

For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl's method and the evolved ammonia was absorbed in 60 mL of `M//10` sulphuric acid. The unreacted acid required 20 mL of `M//10` sodium hydroxide for complete neutralisation. The percentage of nitrogen in the compound is

A

`3%`

B

`5%`

C

`6%`

D

`10%`

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