SATHEE: Organic Chemistry Some Basic Principles and Techniques

Organic Chemistry Some Basic Principles and Techniques - Result Question 46

####52. In the Kjeldahl’s method for estimation of nitrogen present in a soil sample, ammonia evolved from $0.75 g$ of sample neutralized $10 m L$ of $1 M H_{2} S O_{4}$ . The percentage of nitrogen in the soil is :

(a) 37.33

(b) 45.33

(d) 43.33

[2014]

Show Answer

Solution:

(a) $10 m L, 1 M H_{2} S O_{4} = 20 m L, 1 M N H_{3}$

$∵$ wt of $N$ in one mole $N H_{3} = 14$

$∴ 20 \times 10^{- 3} m o l N H_{3} ⟶$

$20 \times 10^{- 3} \times 14 nitrogen$

$∴ 0.75 g$ of sample contains

$= \frac{14 \times 20 \times 10^{- 3}}{0.75} \times 100 = 37.33$

Organic Chemistry Some Basic Principles and Techniques - Result Question 46

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Organic Chemistry Some Basic Principles and Techniques - Result Question 46

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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