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In the Kjeldahl's method for estimation ...

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia avolved from 0.75 g of sample neutralized 10 mL of 1 M `H_(2)SO_(4)`. The percentage of nitrogen in the soil is

A

`37.33`

B

`45.33`

C

`35.33`

D

`43.33`

Text Solution

Verified by Experts

The correct Answer is:
A
According to Kjeldahl.s method,
`1.4 xx ` Molarity of `H_2 SO_4xx` twice the
`%` of `N = ("Volume of" H_2 SO_4 " used" )/( "Mass of substance taken")`
`= ((1.4 xx 1 xx 20)/( 0.75))= 37.33%`
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