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12th Chemistry Monthly Test - 2 ( Organic Nitrogen Compounds )

St. Britto Hr. Sec. School - Madurai

12th Chemistry Monthly Test - 2 ( Organic Nitrogen Compounds )-Aug 2020

Time : 2.00 Hours

Part - A

Generic 2 - Answer All Question

How is benzene diazon.ium chloride prepared?

An aromatic simplest nitro compound A on reduction using Sn and HCI gives B.
B undergoes carbylamine reaction. Identify A and B. Give any one use of compound A.

Write down the possible isomers of the C₄H₉NO₂ give their IUPAC names.

Write a reaction to show the conversion of acetic acid to benzoic acid.

Write a note on Libermann's nitroso test.

Identify A, B, C and D

aniline + benzaldehyde --> A\(\xrightarrow { Con\quad HNO_{ 3 } } C+D\)

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.

How will you convert benzene to m-dinitro benzene?

Account for the following

(i) Aniline does not undergo Friedel - Crafts reaction
(ii) Diazonium salts of aromatic amines are more stable than those of aliphatic amines
(iii) pK_b of aniline is more than that of methylamine
(iv) Gabriel phthalimide synthesis is preferred for synthesising primary amines.
(v) Ethylamine is soluble in water whereas aniline is not
(vi) Amines are more basic than amides
(viii)Although amino group is o - and p - directing in aromatic electrophilic substitution reactions, aniline on
nitration gives a substantial amount of m - nitroaniline.

Write a note on addition reactions of alkyl isocyanides.

Write notes on Gomberg reaction.

Explain why ethylamine is stronger than anunonia?

What happens when

(i) 2 - Nitropropane boiled with HCl
(ii) Nitrobenzene undergo electrolytic - reduction in strongly acidic medium.
(iii) Oxidation of tert - butylamine with KMnO₄
(iv) Oxidation of acetoneoxime with trifluoroperoxy acetic acid.
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.
How will you convert nitrobenzene into
(i) 1,3,5 - trinitrobenzene
(ii) o and p- nitrophenol
(iii) m - nitro aniline
(iv) azoxybenzene
(v) hydrozobenzene
(vi) N - phenylhydroxylamine
(vii) aniline

Write short notes on the following
(i) Hofmann's bromide reaction
(ii) Ammonolysis
(iii) Gabriel phthalimide synthesis
(iv) Schotten - Baumann reaction
(v) Carbylamine reaction
(vi) Mustard oil reaction
(vii) Coupling reaction
(viii) Diazotisation
(ix) Gomberg reaction

Nitrobenzene does not undergo Friedel Crafts reaction - Give reason.

Identify the compounds A,B,C in the following reactions:

Identify A,B,C and D

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

Convertmethylisocyanide \(\longrightarrow \) dimethylamine

How does benzenediazonium chloride react with (i) KI (ii) KCN (iii) NaNO₂/Cu⁺?

Write the uses of nitro cil.kanes.

How will you prepare propan - 1- amine from

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

Bring about the conversion of Chlorobenzene to aniline.

Give the reduction of Nitromethane in (a) Acid medium (b) Neutral medium.

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

Part - B

Generic 5 - Answer All Question

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.

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

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

Account for

i) Reduction of CH₃CN gives CH₃CH₂NH₂while CH₃NC gives (CH₃)₂NH.

ii) (CH₃)₂NH requires two molar proportion of CH₃I to give the same crystalline product formed by (CH₃₎₂N with one mole of CH₃I.

iii) Nitration of aniline with conc.HNO₃may end up with same meta nitro product.

iv) p-toluidine is a stronger base than p-nitroaniline.

Write the differences between nitro methane and nitro benzene.

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.

How do primary, secondary and tertiary amines react with nitrous acid?

Outline the mechanism of (a) Nitration of aniline, (b) Acetylation of aniline.

How can the following coversion be effected?

i) Nitrobenzene \(\longrightarrow \) Nitrosobenzene
ii) Nitrobenzene \(\longrightarrow \) Azoxybenzene
iii) Nitrobenzene \(\longrightarrow \) Hydrazobenzene

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