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For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl 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 completeneutralization. The percentage of nitrogen in the compound is:
- a)6%
- b)10%
- c)3%
- d)5%
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
For the estimation of nitrogen, 1.4 g of an organic compound was diges...
According to Kjeldahl method, it has three steps:
1. Digestion
1. Digestion
2. Neutralization
3. Titration
Estimation of nitrogen
Percentage of N=1.4NV / W
wt. of organic compound = 1.4 g
Ammonia = Meq of sulphuric acid
Sulphuric acid = 15 x 60= 12 Meq
Meq of sulphuric acid when reacts with sodium hydroxide = 20x110=2 Meq
Sulphuric acid against ammonia = 12.2= 10
or
Percentage of Nitrogen = 1.4 x 101.4 = 10%
Percentage of N=1.4NV / W
wt. of organic compound = 1.4 g
Ammonia = Meq of sulphuric acid
Sulphuric acid = 15 x 60= 12 Meq
Meq of sulphuric acid when reacts with sodium hydroxide = 20x110=2 Meq
Sulphuric acid against ammonia = 12.2= 10
or
Percentage of Nitrogen = 1.4 x 101.4 = 10%
Most Upvoted Answer
For the estimation of nitrogen, 1.4 g of an organic compound was diges...
Given data:
- Mass of organic compound = 1.4 g
- Volume of M/10 sulphuric acid used = 60 mL
- Volume of M/10 sodium hydroxide used for neutralization = 20 mL
Calculations:
1. The amount of ammonia evolved can be calculated using the volume of acid used:
- 1 mL of M/10 sulfuric acid reacts with 1/5 g of nitrogen
- So, 60 mL of M/10 sulfuric acid will react with (60/5) = 12 g of nitrogen
- Since 1.4 g of organic compound contains nitrogen, the percentage of nitrogen in the compound is (1.4/12) x 100 = 11.67%
2. The unreacted acid after the reaction with nitrogen can be calculated:
- 60 mL - 20 mL = 40 mL of acid reacted with nitrogen
- 20 mL of M/10 sodium hydroxide neutralizes 40 mL of M/10 sulfuric acid
- This means 1 mL of M/10 sulfuric acid corresponds to 0.5 mL of M/10 sodium hydroxide
- The unreacted acid is 20 mL, which corresponds to 10 mL of M/10 sodium hydroxide
- This 10 mL of sodium hydroxide corresponds to 1/2 g of nitrogen
- So, the original 1.4 g of organic compound contains (1/2) x (1.4/10) x 100 = 7% nitrogen
Therefore, the percentage of nitrogen in the compound is approximately 10%, which corresponds to option B.
- Mass of organic compound = 1.4 g
- Volume of M/10 sulphuric acid used = 60 mL
- Volume of M/10 sodium hydroxide used for neutralization = 20 mL
Calculations:
1. The amount of ammonia evolved can be calculated using the volume of acid used:
- 1 mL of M/10 sulfuric acid reacts with 1/5 g of nitrogen
- So, 60 mL of M/10 sulfuric acid will react with (60/5) = 12 g of nitrogen
- Since 1.4 g of organic compound contains nitrogen, the percentage of nitrogen in the compound is (1.4/12) x 100 = 11.67%
2. The unreacted acid after the reaction with nitrogen can be calculated:
- 60 mL - 20 mL = 40 mL of acid reacted with nitrogen
- 20 mL of M/10 sodium hydroxide neutralizes 40 mL of M/10 sulfuric acid
- This means 1 mL of M/10 sulfuric acid corresponds to 0.5 mL of M/10 sodium hydroxide
- The unreacted acid is 20 mL, which corresponds to 10 mL of M/10 sodium hydroxide
- This 10 mL of sodium hydroxide corresponds to 1/2 g of nitrogen
- So, the original 1.4 g of organic compound contains (1/2) x (1.4/10) x 100 = 7% nitrogen
Therefore, the percentage of nitrogen in the compound is approximately 10%, which corresponds to option B.
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For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10sulphuric acid. The unreacted acid required 20 mL of M/10sodium hydroxide for completeneutralization. The percentage of nitrogen in the compound is:a)6%b)10%c)3%d)5%Correct answer is option 'B'. Can you explain this answer?
Question Description
For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10sulphuric acid. The unreacted acid required 20 mL of M/10sodium hydroxide for completeneutralization. The percentage of nitrogen in the compound is:a)6%b)10%c)3%d)5%Correct answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10sulphuric acid. The unreacted acid required 20 mL of M/10sodium hydroxide for completeneutralization. The percentage of nitrogen in the compound is:a)6%b)10%c)3%d)5%Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10sulphuric acid. The unreacted acid required 20 mL of M/10sodium hydroxide for completeneutralization. The percentage of nitrogen in the compound is:a)6%b)10%c)3%d)5%Correct answer is option 'B'. Can you explain this answer?.
For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10sulphuric acid. The unreacted acid required 20 mL of M/10sodium hydroxide for completeneutralization. The percentage of nitrogen in the compound is:a)6%b)10%c)3%d)5%Correct answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10sulphuric acid. The unreacted acid required 20 mL of M/10sodium hydroxide for completeneutralization. The percentage of nitrogen in the compound is:a)6%b)10%c)3%d)5%Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10sulphuric acid. The unreacted acid required 20 mL of M/10sodium hydroxide for completeneutralization. The percentage of nitrogen in the compound is:a)6%b)10%c)3%d)5%Correct answer is option 'B'. Can you explain this answer?.
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