Given below are two statements I and II.
Statement I : Dumas method is used for estimation of "Nitrogen" in an organic compound.
Statement II : Dumas method involves the formation of ammonium sulphate by heating the organic compound with conc .
In the light of the above statements, choose the correct answer from the options given below
Statement I : Dumas method is used for estimation of "Nitrogen" in an organic compound.
Statement II : Dumas method involves the formation of ammonium sulphate by heating the organic compound with conc .
In the light of the above statements, choose the correct answer from the options given below
- (A)Both Statement I and Statement II are true
- (B)Statement I is false but Statement II is true
- (C)Both Statement I and Statement II are false
- (D)Statement I is true but Statement II is false✓ Correct
Answer: (D)
Solution
Statement I is correct: the Dumas method is a standard technique for estimating the percentage of nitrogen in an organic compound.
Statement II, however, describes the Kjeldahl method, not the Dumas method — heating an organic compound with concentrated to form ammonium sulphate is the basis of Kjeldahl estimation. In the Dumas method the compound is instead heated with copper oxide in a stream of , converting the organic nitrogen directly to gas, whose volume is measured to determine nitrogen content.
Statement I is true but Statement II is false.
Statement II, however, describes the Kjeldahl method, not the Dumas method — heating an organic compound with concentrated to form ammonium sulphate is the basis of Kjeldahl estimation. In the Dumas method the compound is instead heated with copper oxide in a stream of , converting the organic nitrogen directly to gas, whose volume is measured to determine nitrogen content.
Statement I is true but Statement II is false.
JEE Main · 2025 · 24 Jan 2025 · Shift 1 · Single correct option