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12th Chemistry Monthly Test - 1 ( Organic Nitrogen Compounds )

St. Britto Hr. Sec. School - Madurai

12th Chemistry Monthly Test - 1 ( Organic Nitrogen Compounds )-Aug 2020

Time : 2.30 Hours

Part - A

Multiple Choice Question - Answer All Question

The compound that does not show tautomerism is _____________

nitrobenzene
nitromethane
nitroethane
2-nitropropane

When nitro methane condenses with acetone it gives

1-nitro-2-propanol
1-nitro-2-methoxy propane
1-nitro-2-methoxy-ethanol
1-nitro-2-methoxy-propanol

Primary amine reacts with CHCI₃/KOH the product formed is ____ and the reaction is called _ reaction.

cyanide, carbyl amine
iso cyanide, carbylamine
isocyanide, mustard oil
cyanide, mustard oil

Conversion of benzene diazonium chloride to chlorobenzene is called _____________

Sandmeyer's reaction
Stephen's reaction
Gomberg reaction
Schotten-Baumann reaction

Which among the following is a tertiary amine?

(CH₃)₃-C-NH₂
(CH₃) ₂- N-C₂H₅

Oxidation of aniline with acidified K₂Cr₂O₇ gives ___________

p-benzoquinone
benzoic acid
benzaldehyde
benzyl alcohol

Sandmeyer's reaction occurs in the presence of _ and

cuprous halide and haloacid
cupric halide and halogen
copper - zinc couple and H₂
none of these

Ethylamine on beating with CS₂ in the presence of HgCI₂forms

C₂H₅NCS
C₂H₅CN
C₂H₅NS
(C₂H₅) ₂S

The organic compound that undergoes carbylamine reaction is

(C₂H₅)₂ NH
C₂H₅NH₂
(C₂H₅)₃ N
(C₂H₅)₄ N⁺L^-

The reaction between benzene diazonium chloride and benzene in the presence of NaOH is ________________

Perkin's reaction
Gattermann's reaction
Sandmeyer reaction
Gomberg-Bachmann reaction

Nitration of nitrobenzene results in
o-dinitrobenzene

1,3,5 trinitrobenzene

m-dinitrobenzene

p-dinitrobenzene
Nitrobenzene on reaction with fuming nitric acid at 80-100°C forms which one of the following products?
1,4 - dinitrobenzene

2,4,6 - tirnitrobenzene

1,2 - dinitrobenzeqe

1,3 - dinitrobenzene

Which one of the following will not undergo Hofmann bromamide reaction

CH₃CONHCH₃
CH₃CH₂CONH₂
CH₃CONH₂
C₆H₅CONH₂

When nitromethane is reduced with Zn dust + NH₄ Cl in neutral medium, we get

CH₃NH₂
C₂H₅NH₂
CH₃NHOH
C₂H₅COOH

The basic strength of amine is in the order of ___________

NH₃ > CH₃ NH₂ > (CH₃)₂ NH
( CH₃)₂ NH > CH₃ NH₂ > NH₃
CH₃ NH₂ > (CH₃)₂ NH > NH₃
NH₃> (CH₃)₂ NH > CH₃ NH₂

(CH₃)₂ - CH- NO when boiled with HCII/H₂0 gives compound 'X'. Identify 'X'.

CH₃COOH
(CH₃) ₂C = 0
CH₃CHO
CH₃NO₂

Part - B

Generic 2 - Answer All Question

Identify A, B and C.

Give the structural formula of

i) 2-amino-2-methyl propane
ii} 2-(N, N- dimethyl) amino butane

Use the following reagents in the correct order and bring about the conversion of benzene to aniline. Reagents - HCl, NH₃, heat, alk KMnO₄,CHCl₃/ AIC1₃,/ Br_2/KOH that can be used.

Can aniline be prepared by Gabriel phthalimide reaction? Justify your answer.

Explain the conversion of benzene to nitrobenzene.

An aromatic primary amine A with molecular formula C₆H₇N undergoes diazotisation to give B. B when treated with hypophosphorous add gives c. Identify A,B andC.

There are two isomers with the formula CH₃NO₂. How will you distinguish between them?

How will you distinguish between primary secondary and tertiary alphatic amines.
Identify A,B,C and D

\(CH_{ 3 } - NO_{ 2 }\xrightarrow [ ]{ LiAlH_{ 4 } } A\xrightarrow [ ]{ 2{ CH }_{ 3 }{ CH }_{ 2 }Br } B\xrightarrow [ ]{ { H }_{ 2 }{ SO }_{ 4 } } C\)

CH₃NO₂\(\underrightarrow { \quad S{ n }_{ 2 }/HCI\quad } \) A \(\xrightarrow [ alcoholic KOH]{CHC{ I }_{ 3 } } \) B \(\underrightarrow { \quad { H }_{ 2 }/P\quad } \) Identify A,B and C.

What is chloropicrin?
How will you prepare propan - 1- amine from

(i) butane nitrile (ii) propanamide (iii) 1- nitropropane

How is fluorobenzene prepared from benzenediazonium chloride? Name the reaction.

Find 'X' and 'Y'

CH₃Br \(\underrightarrow { \quad Na{ N }_{ 3 }\quad } \) 'X' ? \(\underrightarrow { LiAIH_{ 3 }\quad } \) 'Y' ?

Explain why arnines are more basic than amides

Convertmethylisocyanide \(\longrightarrow \) dimethylamine

In the given set of reactions, 2 bromopropane

\(\xrightarrow [ \triangle ]{Alc.AgCN} \) 'X' \(\underrightarrow { LiAIH_{ 4 }\quad } \) 'Y' Identify the product Y and give its IUPAC name.

Part - C

Generic 3 - Answer All Question

Starting from the following reagents,how will your prepare ethanenitrile.

i) CH₃Br

ii) CH₃CONH₂

iii) CH₃CH=NOH

How are the following compounds obtained from benzene diazonium chloride ?

(i) phenol (ii) ester (iii) p-hydroxy azo benzene.
How will convert nitrobenzene to benzoic acid?

An organic compound 'A' on reduction gives compound 'B' which on reaction with
trichloromethane and caustic potash forms 'C'. Compound 'C' on catalytic reduction
given N-methyl benzenamine. Identify A, B and C and write the reactions involved.

How are nitro alkanes prepared following

i) alkyl bromides
ii) methane

Convert aniline to p-nitro aniline.

How can the following conversion be effected?

i) Nitrobenzene to anisole

ii) Chloro benzene to phenyl hydrazine

iii) Aniline to benzoic acid

iv) Benzene diazonium chloride to ehtyl benzene.

Aniline reacts with Br_2/H₂O to give a tribromo derivative. How would you convert aniline to get a mono bromo derivate?

An Organic compound (A) With molecular formula C₆H₇N gives (B) with HNO₂ /HCl at 273 K. The aqueous solution of (B) on heating gives compound (C) which gives violet colour with netural FeC1₃ Identify the compounds (A), (B) and (C) and write the equations.
Write a note on acidic nature of nitroalkanes

Outline the preparation of (a) para nitroaniline from aniline, (b) tri bromo benzene from tribromo aniline.

Write a note on structure of amine.

Part - D

Generic 5 - Answer All Question

Write a note on the 'reduction of nitro benzene under different conditions.

Account for the following: (i) Nitroethane is soluble NaOH (ii) Nitroethane reacts with nitrous acid (iii) 2-methyl-2-nitro propane has neither of the properties.

Write a note on (i) Carbylamine reaction (ii) Mustard oil reaction (iii) Acetylation of benzylamine (iv) Formation of Schiff's base (v) Diazotisation reaction.

Draw a flow chart to show classification of nitro compound giving examples for each type.

What happens when ethylamine is treated with

(i) CHCI₃/NaOH (ii) CS₂ (iv) C₆H₅CHO.
Account for the following :
i) (CH₃)₂ NH is stronger base than NH₃

ii) CH₃CH₂NH₂ is more basic than CH₃CONH₂

iii) Aniline is less basic than Ethyl amine

iv) On sulphonation of aniline, p-amino benzene sulphonic acid is formed.

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