Chemistry · JEE

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

3+ syllabus-aligned questions available

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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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Why practise PYQs for Detection of extra elements (Nitrogen, sulphur, halogens) in organic compounds?

PYQs reveal recurring concepts, common traps, and the difficulty level JEE expects. Solving them builds exam temperament and time management.

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Our bank includes exam-style MCQs aligned with JEE Main Chemistry syllabus for Detection of extra elements (Nitrogen, sulphur, halogens) in organic compounds, covering the same topics as previous year papers.

How should I use PYQs for Principles Related to Practical Chemistry?

Solve timed sets, review every explanation, note weak subtopics, then revisit with focused practice on Goodmarks.

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Yes. Every question includes the correct answer and a detailed explanation showing the reasoning.