Chemistry · JEE

Important Questions: Detection of extra elements (Nitrogen, sulphur, halogens) in organic compounds for JEE

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The most important Detection of extra elements (Nitrogen, sulphur, halogens) in organic compounds questions for JEE cover conceptual traps, standard results, and numerical patterns from Detection of extra elements (Nitrogen, sulphur, halogens) in organic compounds. Goodmarks provides 3+ high-yield MCQs with full solutions.

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Syllabus context

Part of Principles Related to Practical Chemistry in JEE Main Chemistry.

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Q1ChemistryUnit 20: Principles Related to Practical Chemistry

In the given figure, the red-brown gas evolved is

Q2ChemistryUnit 20: Principles Related to Practical Chemistry

Carbon dioxide formed after reaction with cupric oxide is tested by :

Q3ChemistryUnit 20: Principles Related to Practical Chemistry

sweetener

A, B, C

and

D .

To identify these samples, he performed certain experiments and noted the following observations. (i)

A

and

D

both form a blue-violet colour with ninhydrin. (ii) Lassaigne extract of

\mathrm{C}

gives positive

A g N O_{3}

test and negative

\boldsymbol{F} \boldsymbol{e}_{4}\left[\boldsymbol{F} \boldsymbol{e}(\boldsymbol{C} \boldsymbol{N})_{6}\right]_{3}

test. (iii) Lassaigne extract of

\mathrm{B}

and

\mathrm{D}

gives positive sodium nitroprusside test. Based on these observations which option is correct?

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Important questions test core concepts that appear frequently across JEE Main and Advanced papers — definitions, standard formulas, and classic problem types.

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