Organic Nitrogen Compounds Additional Practice Test

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

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

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

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

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

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

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

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

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

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)

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

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.

Q10

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

Q11

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

Q12

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

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

Q13

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

Q14

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

Q15

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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