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Compounds Containing Nitrogen question

2025 · 24 Jan · Shift 1 · Q3
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  5. /2025 · 24 Jan · Shift 1 · Q3

Compounds Containing Nitrogen question

2025 · 24 Jan · Shift 1 · Q3

JEE MainChemistryCompounds Containing NitrogenMCQ+4 / −1
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 H2SO4\mathrm{H}_2 \mathrm{SO}_4H2​SO4​. In the light of the above statements, choose the correct answer from the options given below
  1. A
    Statement I is true but Statement II is false
  2. B
    Statement I is false but Statement II is true
  3. C
    Both Statement I and Statement II are true
  4. D
    Both Statement I and Statement II are false
View written solutionFree

Correct answer: A

  1. Analyze Statement I

    Statement I says: Dumas method is used for estimation of nitrogen in an organic compound.

    This is true.

    In the Dumas method, the organic compound is heated with copper oxide, and the nitrogen present in the compound is ultimately liberated as N2\mathrm{N_2}N2​. The volume of nitrogen gas is measured to estimate the percentage of nitrogen.

  2. Analyze Statement II

    Statement II says: Dumas method involves the formation of ammonium sulphate by heating the organic compound with concentrated H2SO4\mathrm{H_2SO_4}H2​SO4​.

    This is false.

    The process described here actually belongs to the Kjeldahl method, not the Dumas method.

    In the Kjeldahl method, nitrogen in the organic compound is converted into ammonium sulphate by heating with concentrated sulfuric acid:

    Organic N→heatconc. H2SO4(NH4)2SO4\text{Organic N} \xrightarrow[\text{heat}]{\mathrm{conc.\ H_2SO_4}} (\mathrm{NH_4})_2\mathrm{SO_4}Organic Nconc. H2​SO4​heat​(NH4​)2​SO4​

    So Statement II incorrectly describes Kjeldahl method as Dumas method.

  3. Conclusion

    • Statement I: True
    • Statement II: False

    Therefore, the correct option is:

    A: Statement I is true but Statement II is false\boxed{\text{A: Statement I is true but Statement II is false}}A: Statement I is true but Statement II is false​

  4. Comparison with stored answer

    Stored correct answer: A

    My derived answer is also A, so they agree.

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