12th Chemistry Monthly Test - 3 (Organic Nitrogen Compounds)

St. Britto Hr. Sec. School - Madurai

12th Chemistry Monthly Test - 3 (Organic Nitrogen Compounds)-Aug 2020

Time : 2.30 Hours

Part - A

Generic 2 - Answer All Question

Identify A,B,C and D

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

Identify X, Y and Z.

What is chloropicrin?

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

Write the uses of nitro cil.kanes.

How will you prepare propan - 1- amine from

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

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.

Give the structural formula of

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

Arrange the following.

(i) In increasing order of solubility in water, C₆H₅NH₂,(C₂H₅ )₂ NH, C₂H₅NH₂

(ii) In increasing order of basic strength
a) aniline, p- toludine and p- nitroaniline

b) C₆H₅NH₂, C₆H₅NHCH₃, C₆H₅NH₂, p-Cl-C₆H₄-NH₂

(iii) In decreasing order of basic strength in gas phase (C₂H₅)NH₂,(C₂H₅)NH, (C₂H₅)₅N and NH₃

(iv) In increasing order of boiling point C₆H₅OH, (CH₃)₂NH, C₂H₅NH₂

(v) In decreasing order of the pK_b values C₂H₅NH₂, C₆H₅NHCH₃,(C₂H₅)₂ NH and CH₃NH₂
(vi) Increasing order of basic strength C₆H₅NH₂,C₆H₅N(CH₃), (C₂H₅)₂NH and CH₃ NH₂
(vii) In decreasing order of basic strength CH₃CH₂NH₂, O₂N NH₂, NH₂,CH₃ - NH₂

Bring about the conversion of Chlorobenzene to aniline.

How is benzene diazon.ium chloride prepared?

Write a note on Sandmeyer's reaction.

When benzarnide is treated with bromine and alkali gives compound A. Also when
benzarnide is reduced by LiAIH₄, compound B is formed. Find A and B. Write the
equations.

Aniline reacts with bromine water to give a white precipitate.

(i) Give the chemical formula of the ,white precipitate formed in the above reaction.

(ii) Write the chemical reaction involved.

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.

What happens when· acetonitrile is hydrolysed?

How will you convert diethylamine into
(i) N, N - diethylacetamide
(ii) N - nitrosodiethylamine

Part - B

Generic 3 - Answer All Question

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

Explain Levine and hauser acetylation.

How are the following compounds obtained from benzene diazonium chloride ?

(i) phenol (ii) ester (iii) p-hydroxy azo benzene.

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.

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

i) CH₃Br

ii) CH₃CONH₂

iii) CH₃CH=NOH

Write a note on acidic nature of nitroalkanes

How are nitro alkanes prepared following

i) alkyl bromides
ii) methane

Write a note on structure of amine.

Convert aniline to p-nitro aniline.

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

Write a note on the basicity of amines.

Part - C

Generic 5 - Answer All Question

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

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.

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.

What happens when ethylamine is treated with

(i) CHCI₃/NaOH (ii) CS₂ (iv) C₆H₅CHO.

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

How can the following coversion be effected?

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

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

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.

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12th Chemistry Monthly Test - 3 (Organic Nitrogen Compounds)

St. Britto Hr. Sec. School - Madurai

12th Chemistry Monthly Test - 3 (Organic Nitrogen Compounds)-Aug 2020

Part - A

Generic 2 - Answer All Question

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

Identify X, Y and Z.

What is chloropicrin?

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

Write the uses of nitro cil.kanes.

How will you prepare propan - 1- amine from (i) butane nitrile (ii) propanamide (iii) 1- nitropropane

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.

Give the structural formula of i) 2-amino-2-methyl propane ii} 2-(N, N- dimethyl) amino butane

Bring about the conversion of Chlorobenzene to aniline.

How is benzene diazon.ium chloride prepared?

Write a note on Sandmeyer's reaction.

When benzarnide is treated with bromine and alkali gives compound A. Also when benzarnide is reduced by LiAIH4, compound B is formed. Find A and B. Write the equations.

Aniline reacts with bromine water to give a white precipitate. (i) Give the chemical formula of the ,white precipitate formed in the above reaction. (ii) Write the chemical reaction involved.

What happens when· acetonitrile is hydrolysed?

How will you convert diethylamine into (i) N, N - diethylacetamide (ii) N - nitrosodiethylamine

Part - B

Generic 3 - Answer All Question

Aniline reacts with Br2/H2O to give a tribromo derivative. How would you convert aniline to get a mono bromo derivate?

Explain Levine and hauser acetylation.

How are the following compounds obtained from benzene diazonium chloride ? (i) phenol (ii) ester (iii) p-hydroxy azo benzene.

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.

Starting from the following reagents,how will your prepare ethanenitrile. i) CH3Br ii) CH3CONH2 iii) CH3CH=NOH

Write a note on acidic nature of nitroalkanes

How are nitro alkanes prepared following i) alkyl bromides ii) methane

Write a note on structure of amine.

Convert aniline to p-nitro aniline.

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

Write a note on the basicity of amines.

Part - C

Generic 5 - Answer All Question

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

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 the differences between nitro methane and nitro benzene.

What happens when ethylamine is treated with (i) CHCI3/NaOH (ii) CS2 (iv) C6H5CHO.

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

How can the following coversion be effected? i) Nitrobenzene \(\longrightarrow \) Nitrosobenzene ii) Nitrobenzene \(\longrightarrow \) Azoxybenzene iii) Nitrobenzene \(\longrightarrow \) Hydrazobenzene

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

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.

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Identify A,B,C and D

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

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

How will you prepare propan - 1- amine from

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

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.

Give the structural formula of

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

When benzarnide is treated with bromine and alkali gives compound A. Also when
benzarnide is reduced by LiAIH₄, compound B is formed. Find A and B. Write the
equations.

Aniline reacts with bromine water to give a white precipitate.

(i) Give the chemical formula of the ,white precipitate formed in the above reaction.

(ii) Write the chemical reaction involved.

How will you convert diethylamine into
(i) N, N - diethylacetamide
(ii) N - nitrosodiethylamine

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

How are the following compounds obtained from benzene diazonium chloride ?

(i) phenol (ii) ester (iii) p-hydroxy azo benzene.

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.

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

i) CH₃Br

ii) CH₃CONH₂

iii) CH₃CH=NOH

How are nitro alkanes prepared following

i) alkyl bromides
ii) methane

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.

What happens when ethylamine is treated with

(i) CHCI₃/NaOH (ii) CS₂ (iv) C₆H₅CHO.

How can the following coversion be effected?

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