Organic Nitrogen Compounds Practice Test

12th Standard Chemistry — Organic Nitrogen Compounds: Online Practice Test

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Which of the following nitro compounds can show tautomerism?

A.Nitroethane B.2-Methyl-2-nitropropane C.Nitrobenzene D.None of these

Which of the following reactions does not yield aniline?

A.degradation of benzamide with Br2 / NaOH B.potassium salt of phthalimide treated with chlorobenzene followed by hydrolysis with aqueous NaOH solution C.reduction of nitrobenzene with Ni or Pt D.reduction of nitrobenzene by Sn / HCl

Which one of the following will not undergo Hofmann bromamide reaction?

A.CH3CONHCH3 B.CH3CH2CONH2 C.CH3CONH2 D.C6H5CONH2

Assertion : Acetamide on reaction with KOH and bromine gives acetic acid Reason : Bromine catalyses hydrolysis of acetamide.

A.if both assertion and reason are true and reason is the correct explanation of assertion B.if both assertion and reason are true but reason is not the correct explanation of assertion C.assertion is true but reason is false D.both assertion and reason are false

In the following sequence of reactions, CH3CH2Br --aq. NaOH--> A --KMnO4/H+--> B --NH3/heat--> C --Br2/NaOH--> D the product D is:

A.bromomethane B.alpha-bromo sodium acetate C.methanamine D.acetamide

Which one of the following nitro compounds does not react with nitrous acid?

A.CH3-CH2-CH2-NO2 B.(CH3)2CH-CH2NO2 C.(CH3)3CNO2 D.CH3-C(O)-CH(CH3)-NO2

Aniline reacts with benzoyl chloride in the presence of NaOH to give benzanilide. This reaction is known as:

A.Friedel-Crafts reaction B.Hell-Volhard-Zelinsky reaction C.Schotten-Baumann reaction D.None of these

The product formed by the reaction of an aldehyde with a primary amine is:

A.carboxylic acid B.aromatic acid C.Schiff's base D.ketone

Which of the following reactions is not correct?

A.CH3CH2NH2 --HNO2--> CH3CH2OH + N2 B.(CH3)2N-C6H5 --NaNO2/HCl--> (CH3)2N-N=NCl C.CH3CONH2 --Br2/NaOH--> CH3NH2 D.None of these

Q10

When aniline reacts with acetic anhydride, the product formed is:

A.o-aminoacetophenone B.m-aminoacetophenone C.p-aminoacetophenone D.acetanilide

Q11

The correct order of basic strength for methyl-substituted amines in aqueous solution is:

A.N(CH3)3 > N(CH3)2H > N(CH3)H2 > NH3 B.N(CH3)H2 > N(CH3)2H > N(CH3)3 > NH3 C.NH3 > N(CH3)H2 > N(CH3)2H > N(CH3)3 D.N(CH3)2H > N(CH3)H2 > N(CH3)3 > NH3

Q12

In the reaction, [3-bromo-4-nitrobenzenediazonium chloride] --A--> [1-bromo-2-nitrobenzene] the reagent 'A' is:

The chemical reaction shows the deamination of 4-bromo-2-nitrobenzenediazonium chloride into 1-bromo-3-nitrobenzene in the presence of reagent A.

A.H3PO2 and H2O B.H+ / H2O C.HgSO4 / H2SO4 D.Cu2Cl2

Q13

In the following reaction sequence, C6H5NO2 --Fe/HCl--> A --NaNO2/HCl, 273K--> B --H2O, 283K--> C the product 'C' is:

A.C6H5-OH B.C6H5-CH2OH C.C6H5-CHO D.C6H5NH2

Q14

Nitrobenzene on reaction with concentrated \(\text{HNO}_3 / \text{H}_2\text{SO}_4\) at \(80\text{-}100^\circ\text{C}\) forms which one of the following products?

A.1,4-dinitrobenzene B.2,4,6-trinitrobenzene C.1,2-dinitrobenzene D.1,3-dinitrobenzene

Q15

A compound with molecular formula \(\text{C}_5\text{H}_{13}\text{N}\) reacts with \(\text{HNO}_2\) to give an optically active compound. The compound is:

A.pentan-1-amine B.pentan-2-amine C.N,N-dimethylpropan-2-amine D.diethyl methyl amine

Q16

Secondary nitroalkanes react with nitrous acid to form:

A.red solution B.blue solution C.green solution D.yellow solution

Q17

Which of the following amines does not undergo acetylation?

A.t-butylamine B.ethylamine C.diethylamine D.triethylamine

Q18

Which one of the following is most basic?

A.2,4-dichloroaniline B.2,4-dimethylaniline C.2,4-dinitroaniline D.2,4-dibromoaniline

Q19

When \(\text{C}_2\text{H}_5\text{ONO}\) is reduced with \(\text{Sn} / \text{HCl}\), the pair of compounds formed are:

A.Ethanol, hydroxylamine hydrochloride B.Ethanol, ammonium hydroxide C.Ethanol, hydroxylamine D.Ethylamine, water

Q20

What is the IUPAC name for the amine with structure \(\text{(CH}_3)_2\text{N-C(CH}_3\text{)(CH}_2\text{CH}_3)_2\)?

A.3-dimethylamino-3-methylpentane B.3-(N,N-diethyl)-3-aminopentane C.3-N,N-trimethylpentanamine D.N,N-dimethyl-3-methylpentan-3-amine

Q21

Identify the product 'P' in the following reaction sequence:

வேதி வினையினைக் காட்டும் படம் மற்றும் அதன் விளைபொருள் தேர்வுகள்.

A.(figure A)

B.(figure B)

C.(figure C)

D.(figure D)

Q22

Ammonium salt of benzoic acid is heated strongly with \(\text{P}_2\text{O}_5\) and the product so formed is reduced and then treated with \(\text{NaNO}_2 / \text{HCl}\) at low temperature. The final compound formed is:

A.Benzene diazonium chloride B.Benzyl alcohol C.Phenol D.Nitrosobenzene

Q23

Identify X in the sequence given below:

வேதி வினை வரிசை மற்றும் வினைப்பொருள் X-க்கான தேர்வுகள்.

A.(figure A)

B.(figure B)

C.(figure C)

D.(figure D)

Q24

Among the following, the reaction that proceeds through an electrophilic substitution, is:

A.(figure A)

B.(figure B)

C.(figure C)

D.(figure D)

Q25

The major product of the following reaction is:

வேதி வினையின் முதன்மை விளைபொருள் தேர்வுகள்.

A.(figure A)

B.(figure B)

C.(figure C)

D.(figure D)

Q26

Which of the following compounds does not exhibit nitro-aci-nitro tautomerism?

A.Nitromethane B.Nitroethane C.2-Nitropropane D.2-Methyl-2-nitropropane

Q27

Arrange the following nitroalkanes in the increasing order of their acidic strength: Nitromethane (I), Nitroethane (II), 2-Nitropropane (III).

A.III < II < I B.I < II < III C.II < I < III D.III < I < II

Q28

What is the product formed when tert-butylamine is oxidised with aqueous KMnO4?

A.2-Methyl-2-nitropropane B.2-Nitropropane C.tert-Butyl alcohol D.Isobutylene

Q29

Which of the following reducing systems reduces nitrobenzene to N-phenylhydroxylamine in a neutral medium?

A.Sn and concentrated HCl B.Zn dust and ammonium chloride C.Tin(II) chloride and KOH D.Lithium aluminium hydride in ether

Q30

Boiling nitroethane with concentrated hydrochloric acid yields which of the following organic compounds?

A.Acetaldehyde B.Acetic acid C.Ethylamine D.Acetamide

Q31

Which of the following represents the correct decreasing order of basic strength of methyl substituted amines in aqueous solution?

A.(CH3)2NH > CH3NH2 > (CH3)3N > NH3 B.(CH3)3N > (CH3)2NH > CH3NH2 > NH3 C.CH3NH2 > (CH3)2NH > (CH3)3N > NH3 D.(CH3)2NH > (CH3)3N > CH3NH2 > NH3

Q32

In the Hofmann-Mustard oil reaction, methylamine is treated with carbon disulphide followed by heating with which reagent to produce methyl isothiocyanate?

A.Mercuric chloride (HgCl2) B.Cuprous chloride (Cu2Cl2) C.Thionyl chloride (SOCl2) D.Phosphorus pentachloride (PCl5)

Q33

At what temperature range is the diazotisation of aniline carried out to obtain stable benzene diazonium chloride?

A.273 K - 278 K B.298 K - 303 K C.313 K - 318 K D.353 K - 358 K

Q34

Why does the direct nitration of aniline with a strong acid mixture produce a substantial amount of meta-nitroaniline?

A.The amino group undergoes oxidation to a meta-directing group. B.Aniline is protonated to form the strongly deactivating, meta-directing anilinium ion. C.The nitrating mixture steric hindrance prevents ortho and para substitution. D.Nitration occurs via a free-radical mechanism in acidic medium.

Q35

Which of the following pH ranges is ideal for the coupling reaction between benzene diazonium chloride and phenol to form p-hydroxyazobenzene?

A.1 - 2 B.4 - 5 C.9 - 10 D.12 - 13

Q36

Which reagent is used in the Sandmeyer reaction to introduce a cyano group into the benzene ring from a diazonium salt?

A.Potassium cyanide and silver powder B.Cuprous cyanide (CuCN) C.Hydrogen cyanide in pyridine D.Sodium cyanide in DMSO

Q37

Partial hydrolysis of acetonitrile (ethanenitrile) using alkaline hydrogen peroxide yields which organic compound?

A.Acetic acid B.Acetamide C.Ethylamine D.Methylamine

Q38

What is the product formed by the self-condensation of two molecules of propandinitrile or propanenitrile in the presence of sodium?

A.3-Imino-2-methylpentanenitrile B.2-Methyl-2-pentenenitrile C.Propionamide D.Diethyl ketone

Q39

What is the major organic product obtained when ethyl bromide is heated with an ethanolic solution of silver cyanide?

A.Ethyl cyanide B.Ethyl isocyanide C.Nitroethane D.Ethylamine

Q40

What are the hydrolysis products of methyl isocyanide when treated with a dilute mineral acid?

A.Methylamine and formic acid B.Acetic acid and ammonia C.Methanol and methanamine D.Dimethylamine and carbon dioxide

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This free online practice test covers Organic Nitrogen Compounds from the 12th Standard Chemistry (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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