Amines & Nitrogen Compounds · JEE Main previous year questions

2020 7 questions

1. Q532020 · 6 Sept 2020 · Shift 2
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: B

2. Q602020 · 6 Sept 2020 · Shift 2

   Match the following : | Test/Method | Reagent | | :--- | :--- | | (i) Lucas Test | (a) ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{S}{\mathrm{O}}_2\mathrm{Cl}$/ aq. $\mathrm{KOH}$ | | (ii) Dumas method | (b) $\mathrm{HN}{\mathrm{O}}_3$/ $\mathrm{AgN}{\mathrm{O}}_3$ | | (iii) Kjeldahl's method | (c) $CuO/C{\mathrm{O}}_2$ | | (iv) Hinsberg test | (d) Conc. $\mathrm{HCl}$ and $\mathrm{ZnC}{\mathrm{l}}_2$ | | | (e) ${\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4$ |

   1. A.(i)-(b), (ii)-(d), (iii)-(e), (iv)-(a)
   2. B.(i)-(d), (ii)-(c), (iii)-(e), (iv)-(a)
   3. C.(i)-(b), (ii)-(a), (iii)-(c), (iv)-(d)
   4. D.(i)-(d), (ii)-(c), (iii)-(b), (iv)-(e)
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   Answer: B

3. Q742020 · 9 Jan 2020 · Shift 1· Numerical answer

   The mass percentage of nitrogen in histamine is _____.

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   Answer: 37.8 to 38.2

4. Q572020 · 9 Jan 2020 · Shift 2
   
   1. A.(III) > (II) > (I) > (IV)
   2. B.(I) > (III) > (IV) > (II)
   3. C.(III) > (I) > (II) > (IV)
   4. D.(II) > (III) > (IV) > (I)
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   Answer: A

5. Q572020 · 7 Jan 2020 · Shift 1

   A solution of m-chloroaniline, m-chlorophenol and m-chlorobenzoic acid in ethyl acetate was extracted initially with a saturated solution of $\mathrm{NaHC}{\mathrm{O}}_3$ to give fraction A. The left over organic phase was extracted with dilute $\mathrm{NaOH}$ solution to give fraction B. The final organic layer was labelled as fraction C. Fractions A, B and C, contain respectively :

   1. A.m-chlorobenzoic acid, m-chloroaniline and m-chlorophenol.
   2. B.m-chlorobenzoic acid, m-chlorophenol and m-chloroaniline.
   3. C.m-chlorophenol, m-chlorobenzoic acid and m-chloroaniline.
   4. D.m-chloroaniline, m-chlorobenzoic acid and m-chlorophenol.
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   Answer: B

6. Q622020 · 7 Jan 2020 · Shift 1

   Match the following : (i) Riboflavin    (a) Beriberi (ii) Thiamine    (b) Scurvy (iii) Pyridoxine   (c) Cheliosis (iv) Ascorbic acid    (d) Convulsions

   1. A.(i)-(c), (ii)-(d), (iii)-(a), (iv)-(b)
   2. B.(i)-(d), (ii)-(b), (iii)-(a), (iv)-(c)
   3. C.(i)-c, (ii)-(a), (iii)-(d), (iv)-(b)
   4. D.(i)-(a), (ii)-(d), (iii)-(c), (iv)-(b)
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   Answer: C

7. Q602020 · 7 Jan 2020 · Shift 2

   A chromatography column, packed with silica gel as stationary phase, was used to separate a mixture of compounds consisting of (A) benzanilide (B) aniline and (C) acetophenone. When the column is eluted with a mixture of solvents, hexane : ethyl acetate (20:80), the sequence of obtained compounds is :

   1. A.(A), (B) and (C)
   2. B.(B), (A) and (C)
   3. C.(C), (A) and (B)
   4. D.(B), (C) and (A)
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   Answer: C