Amines & Nitrogen Compounds · JEE Main previous year questions

The mass percentage of nitrogen in histamine is _____.

1. A.(III) > (II) > (I) > (IV)
2. B.(I) > (III) > (IV) > (II)
3. C.(III) > (I) > (II) > (IV)
4. D.(II) > (III) > (IV) > (I)

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.

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)

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)

The coordination numbers of Co and Al in $[{\text{Co(Cl)(en)}}_2]\text{Cl}$ and ${\text{K}}_3[{\text{Al(C}}_2{\text{O}}_4{)}_3]$, respectively, are : (en = ethane-1, 2-diamine)

1. A.3 and 3
2. B.6 and 6
3. C.5 and 3
4. D.5 and 6

1. A.
2. B.
3. C.
4. D.

Ethylamine (${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{N}{\mathrm{H}}_2$) can be obtained from N-ethylphthalimide on treatment with :

1. A.$\mathrm{Ca}{\mathrm{H}}_2$
2. B.${\mathrm{H}}_2\mathrm{O}$
3. C.$\mathrm{NaB}{\mathrm{H}}_4$
4. D.$\mathrm{N}{\mathrm{H}}_2\mathrm{N}{\mathrm{H}}_2$

1. A.
2. B.
3. C.
4. D.

The species that can have a trans-isomer is : (en = ethane-1, 2-diamine, ox = oxalate)

1. A.$[\mathrm{Cr}(\mathrm{en}{)}_2(\mathrm{ox}){]}^{+}$
2. B.$[\mathrm{Pt}(\mathrm{en})\mathrm{C}{\mathrm{l}}_2]$
3. C.$[\mathrm{Pt}(\mathrm{en}{)}_2\mathrm{C}{\mathrm{l}}_2{]}^{2+}$
4. D.$[\mathrm{Zn}(\mathrm{en})\mathrm{C}{\mathrm{l}}_2]$

Which of the following is not a correct method of the preparation of benzylamine from cyanobenzene ?

1. A.(i) $\mathrm{SnC}{\mathrm{l}}_2+\mathrm{HCl}(\mathrm{gas})$ \quad (ii) $\mathrm{NaB}{\mathrm{H}}_4$
2. B.${\mathrm{H}}_2/Ni$
3. C.(i) $\mathrm{LiAl}{\mathrm{H}}_4$ \quad (ii) ${\mathrm{H}}_3{\mathrm{O}}^{+}$
4. D.(i) $HCl/{\mathrm{H}}_2\mathrm{O}$ \quad (ii) $\mathrm{NaB}{\mathrm{H}}_4$

1. A.
2. B.
3. C.
4. D.

1. A.
2. B.
3. C.
4. D.

Aniline dissolved in dilute HCl is reacted with sodium nitrite at 0°C. This solution was added dropwise to a solution containing equimolar mixture of aniline and phenol in dil. HCl. The structure of the major product is

1. A.${\mathrm{C}}_6{\mathrm{H}}_5-\mathrm{N}=\mathrm{N}-{\mathrm{C}}_6{\mathrm{H}}_4-\mathrm{OH}$ (para)
2. B.${\mathrm{C}}_6{\mathrm{H}}_5-\mathrm{N}=\mathrm{N}-\mathrm{NH}-{\mathrm{C}}_6{\mathrm{H}}_5$
3. C.${\mathrm{C}}_6{\mathrm{H}}_5-\mathrm{N}=\mathrm{N}-{\mathrm{C}}_6{\mathrm{H}}_4-\mathrm{N}{\mathrm{H}}_2$ (para)
4. D.${\mathrm{C}}_6{\mathrm{H}}_5-\mathrm{N}=\mathrm{N}-\mathrm{O}-{\mathrm{C}}_6{\mathrm{H}}_5$

The peptide that gives positive ceric ammonium nitrate and carbylamine tests is :

1. A.Ser-Lys
2. B.Asp-Gln
3. C.Gln-Asp
4. D.Lys-Asp

Hinsberg's reagent is :

1. A.${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COCl}$
2. B.${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{S}{\mathrm{O}}_2\mathrm{Cl}$
3. C.$\mathrm{SOC}{\mathrm{l}}_2$
4. D.$(\mathrm{COCl}{)}_2$

The correct match between Item I and Item II is : $$\begin{array}{llll}\text{Item I}& & \text{Item II}& \\ \text{(A)}& \text{Ester test}& \text{(P)}& \text{Tyr}\\ \text{(B)}& \text{Carbylamine test}& \text{(Q)}& \text{Asp}\\ \text{(C)}& \text{Phthalein dye test}& \text{(R)}& \text{Ser}\\ & & \text{(S)}& \text{Lys}\end{array}$$

1. A.$\text{(A)}\to \text{(Q); (B)}\to \text{(S); (C)}\to \text{(P)}$
2. B.$\text{(A)}\to \text{(R); (B)}\to \text{(S); (C)}\to \text{(Q)}$
3. C.$\text{(A)}\to \text{(R); (B)}\to \text{(Q); (C)}\to \text{(P)}$
4. D.$\text{(A)}\to \text{(Q); (B)}\to \text{(S); (C)}\to \text{(R)}$

A compound 'X' on treatment with $\mathrm{B}{\mathrm{r}}_2/NaOH$, provided ${\mathrm{C}}_3{\mathrm{H}}_9\mathrm{N}$, which gives positive carbylamine test. Compound 'X' is :

1. A.$\mathrm{C}{\mathrm{H}}_3\mathrm{C}{\mathrm{H}}_2\mathrm{C}{\mathrm{H}}_2\mathrm{CON}{\mathrm{H}}_2$
2. B.$\mathrm{C}{\mathrm{H}}_3\mathrm{CON}(\mathrm{C}{\mathrm{H}}_3{)}_2$
3. C.$\mathrm{C}{\mathrm{H}}_3\mathrm{C}{\mathrm{H}}_2\mathrm{COC}{\mathrm{H}}_2\mathrm{NH}$
4. D.$\mathrm{C}{\mathrm{H}}_3\mathrm{COC}{\mathrm{H}}_2\mathrm{NHC}{\mathrm{H}}_3$

1. A.I > II > III
2. B.III > I > II
3. C.III > II > I
4. D.I > III > II

The correct match between Item-I and Item-II is : $$\begin{array}{llll}\text{Item-I (drug)}& & \text{Item-II (test)}& \\ \text{A}& \text{Chloroxylenol}& \text{P}& \text{Carbylamine test}\\ \text{B}& \text{Norethindrone}& \text{Q}& \text{Sodium hydrogen carbonate test}\\ \text{C}& \text{Sulphapyridine}& \text{R}& \text{Ferric chloride test}\\ \text{D}& \text{Penicillin}& \text{S}& \text{Bayer’s test}\end{array}$$

1. A.$\mathrm{A}\to \mathrm{R};\mathrm{B}\to \mathrm{P};\mathrm{C}\to \mathrm{S};\mathrm{D}\to \mathrm{Q}$
2. B.$\mathrm{A}\to \mathrm{Q};\mathrm{B}\to \mathrm{S};\mathrm{C}\to \mathrm{P};\mathrm{D}\to \mathrm{R}$
3. C.$\mathrm{A}\to \mathrm{R};\mathrm{B}\to \mathrm{S};\mathrm{C}\to \mathrm{P};\mathrm{D}\to \mathrm{Q}$
4. D.$\mathrm{A}\to \mathrm{Q};\mathrm{B}\to \mathrm{P};\mathrm{C}\to \mathrm{S};\mathrm{D}\to \mathrm{R}$

1. A.(d) < (b) < (a) < (c)
2. B.(a) < (b) < (c) < (d)
3. C.(b) < (a) < (c) < (d)
4. D.(b) < (a) < (d) < (c)

1. A.
2. B.
3. C.
4. D.

Which one of the following complexes shows optical isomerism? (en = ethylenediamine)

1. A.$\mathrm{cis}[\mathrm{Co}(\mathrm{en}{)}_2\mathrm{C}{\mathrm{l}}_2]\mathrm{Cl}$
2. B.$\mathrm{trans}[\mathrm{Co}(\mathrm{en}{)}_2\mathrm{C}{\mathrm{l}}_2]\mathrm{Cl}$
3. C.$[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_4\mathrm{C}{\mathrm{l}}_2]\mathrm{Cl}$
4. D.$[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_3\mathrm{C}{\mathrm{l}}_3]$

In the Hofmann bromamide degradation reaction, the number of moles of $\mathrm{NaOH}$ and $\mathrm{B}{\mathrm{r}}_2$ used per mole of amine produced are:

1. A.Four moles of $\mathrm{NaOH}$ and two moles of $\mathrm{B}{\mathrm{r}}_2$.
2. B.Two moles of $\mathrm{NaOH}$ and two moles of $\mathrm{B}{\mathrm{r}}_2$
3. C.Four moles of $\mathrm{NaOH}$ and one mole of $\mathrm{B}{\mathrm{r}}_2$
4. D.One mole of $\mathrm{NaOH}$ and one mole of $\mathrm{B}{\mathrm{r}}_2$

On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is:

1. A.an alkyl cyanide
2. B.an alkyl isocyanide
3. C.an alkanol
4. D.an alkanediol