Given below are two statements I and II. Statement I: Dumas method is used for estimation of "Nitrogen" in an organic…
Practical Organic Chemistry · Class 11 · JEE Main Previous Year Question
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:
(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
- 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
Statement I is true but Statement II is false
Statement I — Dumas method for nitrogen estimation:
Dumas method IS used for the estimation of nitrogen in organic compounds.
→ Statement I is TRUE ✓
Statement II — Mechanism of Dumas method:
In Dumas method, the organic compound is heated with CuO (copper oxide) in a stream of CO₂. Nitrogen in the compound is converted to N₂ gas, which is collected over KOH solution.
The formation of ammonium sulphate by heating with conc H₂SO₄ is the Kjeldahl method, NOT Dumas method.
→ Statement II is FALSE ✗
Answer: (d) Statement I is true but Statement II is false
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