Amines & Nitrogen Compounds · JEE Main previous year questions

An amine (X) is prepared by ammonolysis of benzyl chloride. On adding p-toluenesulphonyl chloride to it the solution remains clear. Molar mass of the amine (X) formed is ________ ${\text{gmol}}^{-1}$. (Given molar mass in ${\text{gmol}}^{-1}\text{C}:12,\text{H}:1,\text{O}:16,\text{N}:14$)

$X\mathrm{g}$ of ethanamine was subjected to reaction with $\mathrm{NaN}{\mathrm{O}}_2/HCl$ followed by hydrolysis to liberate ${\mathrm{N}}_2$ and $\mathrm{HCl}$. The $\mathrm{HCl}$ generated was completely neutralised by $0.2\mathrm{moles}$ of $\mathrm{NaOH}$. $X$ is ____ $\mathrm{g}$.

$X\mathrm{g}$ of ethylamine is subjected to reaction with $\mathrm{NaN}{\mathrm{O}}_2/HCl$ followed by water; evolved dinitrogen gas which occupied $2.24\mathrm{L}$ volume at STP. $X$ is ____ $\times 10^{-1}\mathrm{g}$.

From $6.55\text{ g}$ of aniline, the maximum amount of acetanilide that can be prepared will be ________ $\times 10^{-1}\text{ g}$.

Given below are two statements : Statement (I) : The $\mathrm{N}{\mathrm{H}}_2$ group in Aniline is ortho and para directing and a powerful activating group. Statement (II) : Aniline does not undergo Friedel-Craft's reaction (alkylation and acylation). In the light of the above statements, choose the most appropriate answer from the options given below :

1. A.Both Statement I and Statement II are correct
2. B.Both Statement I and Statement II are incorrect
3. C.Statement I is correct but Statement II is incorrect
4. D.Statement I is incorrect but Statement II is correct

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Haloalkanes react with KCN to form alkyl cyanides as a main product while with $\mathrm{AgCN}$ form isocyanide as the main product. Reason (R) : $\mathrm{KCN}$ and $\mathrm{AgCN}$ both are highly ionic compounds. In the light of the above statements, choose the most appropriate answer from the options given below :

1. A.(A) is correct but $(\mathbf{R})$ is not correct
2. B.Both (A) and (R) are correct and (R) is the correct explanation of (A)
3. C.(A) is not correct but (R) is correct
4. D.Both (A) and (R) are correct but (R) is not the correct explanation of (A)

Given below are two statements : Statement (I) : Aminobenzene and aniline are same organic compounds. Statement (II) : Aminobenzene and aniline are different organic compounds. In the light of the above statements, choose the most appropriate answer from the options given below :

1. A.Both Statement I and Statement II are correct
2. B.Statement I is incorrect but Statement II is correct
3. C.Statement I is correct but Statement II is incorrect
4. D.Both Statement I and Statement II are incorrect

Match List I with List II $$\begin{array}{llll}& \text{List - I (Technique)}& & \text{List - II (Application)}\\ \text{(A)}& \text{Distillation}& \text{(I)}& \text{Separation of glycerol from spent-lye}\\ \text{(B)}& \text{Fractional distillation}& \text{(II)}& \text{Aniline - Water mixture}\\ \text{(C)}& \text{Steam distillation}& \text{(III)}& \text{Separation of crude oil fractions}\\ \text{(D)}& \text{Distillation under reduced pressure}& \text{(IV)}& \text{Chloroform - Aniline}\end{array}$$ Choose the correct answer from the options given below:

1. A.A-I, B-II, C-IV, D-III
2. B.A-II, B-III, C-I, D-IV
3. C.A-IV, B-I, C-II, D-III
4. D.A-IV, B-III, C-II, D-I

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

Given below are two statements : Statement I : Aniline reacts with con. ${\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4$, followed by heating at $453-473\mathrm{K}$ gives $\mathrm{p}$-aminobenzene sulphonic acid, which gives blood red colour in the 'Lassaigne's test'. Statement II : In Friedel - Craft's alkylation and acylation reactions, aniline forms salt with the $\mathrm{AlC}{\mathrm{l}}_3$ catalyst. Due to this, nitrogen of aniline aquires a positive charge and acts as deactivating group. In the light of the above statements, choose the correct answer from the options given below :

1. A.Both statement I and statement II are true
2. B.Statement I is true but statement II is false
3. C.Statement I is false but statement II is true
4. D.Both statement I and statement II are false

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

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

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

$9.3\text{ g}$ of aniline is subjected to reaction with excess of acetic anhydride to prepare acetanilide. The mass of acetanilide produced if the reaction is $100\%$ completed is _______ $\times 10^{-1}\text{ g}$. (Given molar mass in ${\text{g mol}}^{-1}$ $\text{N}:14,\text{O}:16$, $\text{C}:12,\text{H}:1$)

Match List I with List II | LIST I | LIST II | | :--- | :--- | | A. Weak intermolecular forces of attraction | I. Hexamethylenediamine + adipic acid | | B. Hydrogen bonding | II. ${\mathrm{AlEt}}_3+{\mathrm{TiCl}}_4$ | | C. Heavily branched polymer | III. 2 - chloro - 1, 3 - butadiene | | D. High density polymer | IV. Phenol + formaldehyde | Choose the correct answer from the options given below:

1. A.A-III, B-I, C-IV, D-II
2. B.A-IV, B-I, C-III, D-II
3. C.A-II, B-IV, C-I, D-III
4. D.A-IV, B-II, C-III, D-I

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

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

Match List I with List II $$\begin{array}{llll}& \text{LIST I}& & \text{LIST II}\\ & \text{Natural amino acid}& & \text{One letter code}\\ \text{A.}& \text{Glutamic acid}& \text{I.}& \mathrm{Q}\\ \text{B.}& \text{Glutamine}& \text{II.}& \mathrm{W}\\ \text{C.}& \text{Tyrosine}& \text{III.}& \mathrm{E}\\ \text{D.}& \text{Tryptophan}& \text{IV.}& \mathrm{Y}\end{array}$$ Choose the correct answer from the options given below:

1. A.A-III, B-IV, C-I, D-II
2. B.A-IV, B-III, C-I, D-II
3. C.A-II, B-I, C-IV, D-III
4. D.A-III, B-I, C-IV, D-II

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

Match List I with List II | LIST I (Vitamin) | LIST II (Deficiency disease) | | :--- | :--- | | A. Vitamin A | I. Beri-Beri | | B. Thiamine | II. Cheilosis | | C. Ascorbic acid | III. Xerophthalmia | | D. Riboflavin | IV. Scurvy | Choose the correct answer from the options given below:

1. A.A-III, B-I, C-IV, D-II
2. B.A-IV, B-I, C-III, D-II
3. C.A-IV, B-II, C-III, D-I
4. D.A-III, B-II, C-IV, D-I

Mass of Urea (${\text{NH}}_2{\text{CONH}}_2$) required to be dissolved in $1000\text{ g}$ of water in order to reduce the vapour pressure of water by $25\%$ is ________ g. (Nearest integer) Given: Molar mass of N, C, O and H are 14, 12, 16 and $1{\text{ g mol}}^{-1}$ respectively

Number of isomeric aromatic amines with molecular formula ${\mathrm{C}}_8{\mathrm{H}}_{11}\mathrm{N}$, which can be synthesized by Gabriel Phthalimide synthesis is ___________.