Amines & Nitrogen Compounds · JEE Main previous year questions

2025 9 questions

1. Q582025 · 8 Apr 2025 · Shift 2
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: C

2. Q532025 · 4 Apr 2025 · Shift 2

   Match List - I with List - II | List - I (Separation of) | List - II (Separation Technique) | | :--- | :--- | | (A) Aniline from aniline-water mixture | (I) Simple distillation | | (B) Glycerol from spent-lye in soap industry | (II) Fractional distillation | | (C) Different fractions of crude oil in petroleum industry | (III) Distillation at reduced pressure | | (D) Chloroform-Aniline mixture | (IV) Steam distillation | Choose the correct answer from the options given below :

   1. A.(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
   2. B.(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
   3. C.(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
   4. D.(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
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   Answer: A

3. Q632025 · 3 Apr 2025 · Shift 2
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: C

4. Q682025 · 2 Apr 2025 · Shift 1

   The correct order of basic nature in aqueous solution for the bases ${\mathrm{NH}}_3,{\mathrm{H}}_2\mathrm{N}-{\mathrm{NH}}_2,{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NH}}_2,({\mathrm{CH}}_3{\mathrm{CH}}_2{)}_2\mathrm{NH}$ and $({\mathrm{CH}}_3{\mathrm{CH}}_2{)}_3\mathrm{N}$ is :

   1. A.${\mathrm{NH}}_3<{\mathrm{H}}_2\mathrm{N}-{\mathrm{NH}}_2<({\mathrm{CH}}_3{\mathrm{CH}}_2{)}_3\mathrm{N}<{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NH}}_2<({\mathrm{CH}}_3{\mathrm{CH}}_2{)}_2\mathrm{NH}$
   2. B.${\mathrm{H}}_2\mathrm{N}-{\mathrm{NH}}_2<{\mathrm{NH}}_3<({\mathrm{CH}}_3{\mathrm{CH}}_2{)}_3\mathrm{N}<{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NH}}_2<({\mathrm{CH}}_3{\mathrm{CH}}_2{)}_2\mathrm{NH}$
   3. C.${\mathrm{NH}}_2-{\mathrm{NH}}_2<{\mathrm{NH}}_3<{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NH}}_2<({\mathrm{CH}}_3{\mathrm{CH}}_2{)}_3\mathrm{N}<({\mathrm{CH}}_3{\mathrm{CH}}_2{)}_2\mathrm{NH}$
   4. D.${\mathrm{NH}}_3<{\mathrm{H}}_2\mathrm{N}-{\mathrm{NH}}_2<{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NH}}_2<({\mathrm{CH}}_3{\mathrm{CH}}_2{)}_2\mathrm{NH}<({\mathrm{CH}}_3{\mathrm{CH}}_2{)}_3\mathrm{N}$
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   Answer: C

5. Q602025 · 2 Apr 2025 · Shift 2

   When a concentrated solution of sulphanilic acid and 1-naphthylamine is treated with nitrous acid $(273\mathrm{K})$ and acidified with acetic acid, the mass $(\mathrm{g})$ of 0.1 mole of product formed is : (Given molar mass in $\mathrm{g}\mathrm{mo}{\mathrm{l}}^{-1}$ $\mathrm{H}:1$, $\mathrm{C}:12$, $\mathrm{N}:14$, $\mathrm{O}:16$, $\mathrm{S}:32$ )

   1. A.330
   2. B.33
   3. C.343
   4. D.66
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   Answer: B

6. Q572025 · 29 Jan 2025 · Shift 2
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: C

7. Q582025 · 24 Jan 2025 · Shift 2
   
   1. A.$\mathrm{A}{\mathrm{c}}_2\mathrm{O},\mathrm{B}{\mathrm{r}}_2,{\mathrm{H}}_2\mathrm{O}(\mathrm{\Delta }),\mathrm{NaOH}$
   2. B.${\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4,\mathrm{A}{\mathrm{c}}_2\mathrm{O},\mathrm{B}{\mathrm{r}}_2,{\mathrm{H}}_2\mathrm{O}(\mathrm{\Delta }),\mathrm{NaOH}$
   3. C.$\mathrm{B}{\mathrm{r}}_2\mid \mathrm{FeB}{\mathrm{r}}_3,{\mathrm{H}}_2\mathrm{O}(\mathrm{\Delta }),\mathrm{NaOH}$
   4. D.$\mathrm{A}{\mathrm{c}}_2\mathrm{O},{\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4,\mathrm{B}{\mathrm{r}}_2,\mathrm{NaOH}$
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   Answer: B

8. Q602025 · 24 Jan 2025 · Shift 2
   
   1. A.(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
   2. B.(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
   3. C.(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
   4. D.(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
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   Answer: B

9. Q682025 · 24 Jan 2025 · Shift 2

   When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will be:

   1. A.Pale Blue $\to$ Blue $\to$ Green $\to$ Violet
   2. B.Pale Blue $\to$ Blue $\to$ Violet $\to$ Green
   3. C.Green $\to$ Pale Blue $\to$ Blue $\to$ Violet
   4. D.Violet $\to$ Blue $\to$ Pale Blue $\to$ Green
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   Answer: C