0.8g of an organic compound was analysed by Kjeldahl’s method for the estimation of nitrogen. If the percentage of nitrogen in the compound was found to be 42%, then mL of 1M H₂SO₄would have been neutralized by the ammonia evolved during the ?

Given data: 

Mass of an organic compound= 0.8g

Percentage of nitrogen in the compound= 42%

1M H2SO4 have been neutralized

To find, the amount of ammonia evolved.

Explanatoin:

 In, 10ml of 1M H2​SO4​ forms a relationship to 20 ml of 1M ammonia.

While, In 1000 ml of 1 M ammonia has 14 g of nitrogen.
Therefore, 20 ml of 1 M ammonia will be containing

100014×20​g of nitrogen.
 

Hence, 0.5 g of organic compound will be containing

100014×20​g of nitrogen.
 

Therefore, 100 g of compound will be containing

1000×0.514×20×100​ that is 56% of nitrogen.

Hence, the correct option is option (A) 12ml.