11th Chemistry Monthly Test - 2 ( Hydrocarbons )

MABS Institution

11th Chemistry Monthly Test - 2 ( Hydrocarbons )-Aug 2020

Time : 2.30 Hours

Part - A

Multiple Choice Question - Answer All Question

The C – H bond and C – C bond in ethane are formed by which of the following types of overlap

sp³ – s and sp³ – sp³
sp² – s and sp² – Sp²
sp – sp and sp – sp
p – s and p – p

Identify the compound (A) in the following reaction

Peroxide effect is not observed in _________.

HCI
HI
HBr
Both (a) and (b)

C- C- C bond angle in benzene is

120°
60°
45°
135°

Fine the odd one out:

Benzene
Ethane
Ethene
Propyne

Molecular formula of benzene is ________.

C₆H₆
C₆H₅
C₇H₈
CH₄

Which one is most stable?

Cyclopropane
Cyclobutane
Cyclopentane
Cyclohexane

Peroxide effect (Kharasch effect) can be studied in case of

Oct – 4 – ene
hex – 3 – ene
pent – 1 – ene
but – 2 – ene

Which of the following is the most stable cycloalkane?

Tbe angle strain in cyclopentane is

72°
1°28'
44'
108°

Part - B

Generic 2 - Answer All Question

How is propyne prepared from an alkyene dihalide?

List out the uses of alkenes.

Why benzene undergoes substitution reaction more readily than addition reaction?

Suggest the route for the preparation of the following from benzene.
1) 3 – chloro nitrobenzene
2) 4 – chlorotoluene
3) Bromo benzene
4) m - dinitro benzene.

Write a short note on resonance in benzene.

Mention the uses of alkanes.

Write a note on methane clathrates.

Part - C

Generic 3 - Answer All Question

How many types of polymerisation are·possible in alkynes?

Write an account on the following reactions involving formation of alkane.
(i) Kolbe's Electrolytic method
(ii) Wurtz reaction
(iii) Carey - House Mechanism

Predict the product for the following.
(i) Benzene + H₂ \(\rightarrow\) ?
(ii) Benzene + CI₂ \(\rightarrow\) ?
(iii) Benzene + O₂\(\rightarrow\) ?
(iv) Benzene + Ch₃Cl \(\rightarrow\) ?
(v) C₆H₅COONa + NaOH \(\rightarrow\)?

Explain the carcinogenity and toxicity of aromatic hydrocarbons.

Explain how 2-butyne reacts with (a) Lindlar's catalyst and (b) Sodium in liquid ammonia?

Complete the following reactions.
(a) \(CH\equiv CH+{ H }_{ 2 }\overset { pt }{ \longrightarrow } ?\overset { { H }_{ 2 } }{ \longrightarrow } ?\)
(b) \({ CH }_{ 3 }-C\equiv CH+{ Br }_{ 2 }\longrightarrow ?\overset { { { Br }_{ 2 } } }{ \longrightarrow } ?\)
(c) \({ CH }_{ 3 }-C\equiv C-{ { CH }_{ 3 }\overset { HCl }{ \longrightarrow } ?\overset { HCl }{ \longrightarrow } ? }\)

Among anthracene and cyclopentadiene which is aromatic? Give reason for your answer.

Part - D

Generic 5 - Answer All Question

What are meta directors? Explain with suitable example

An organic compound (A) of a molecular formula C6H6 which is a simple aromatic hydrocarbon. A undergoes hydrogenation to give a cyclic compound (B). A reacts with chlorine in the presence of UV-light to give C which is used as insecticide. Identify A, Band C. Explain the reactions with equation

Write the mechanism for following reaction.
\(\underset { (Propene) }{ { CH }_{ 3 }-CH={ CH }_{ 2 }+HBr } \overset { \left( { C }_{ 6 }{ H }_{ 5 }{ CO }_{ 2 } \right) { O }_{ 2 } }{ \longrightarrow } \underset { 1I-bromoprone }{ { CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 2 }-Br } \)

Explain the structure of benzene.
Explain in detail about the addition of hydrogen halide to an unsymmetrical alkene.

Give IUPAC names for the following compounds
1) CH₃ – CH = CH – CH = CH – C ≡ C – CH₃
2)
3) (CH₃)₃ C – C ≡ C – CH (CH₃)₂
4) ethyl isopropyl acetylene
5) CH ≡ C – C ≡ C – C ≡ CH

What happens when propene is treated with the following.
(i) H₂SO₄
(ii) Ozone
(iii) HBr
(iv) Red hot Fe tube
(v) Acidified KMnO₄

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11th Chemistry Monthly Test - 2 ( Hydrocarbons )

MABS Institution

11th Chemistry Monthly Test - 2 ( Hydrocarbons )-Aug 2020

Part - A

Multiple Choice Question - Answer All Question

The C – H bond and C – C bond in ethane are formed by which of the following types of overlap

Identify the compound (A) in the following reaction

Peroxide effect is not observed in _________.

C- C- C bond angle in benzene is

Fine the odd one out:

Molecular formula of benzene is ________.

Which one is most stable?

Peroxide effect (Kharasch effect) can be studied in case of

Which of the following is the most stable cycloalkane?

Tbe angle strain in cyclopentane is

Part - B

Generic 2 - Answer All Question

How is propyne prepared from an alkyene dihalide?

List out the uses of alkenes.

Why benzene undergoes substitution reaction more readily than addition reaction?

Suggest the route for the preparation of the following from benzene. 1) 3 – chloro nitrobenzene 2) 4 – chlorotoluene 3) Bromo benzene 4) m - dinitro benzene.

Write a short note on resonance in benzene.

Mention the uses of alkanes.

Write a note on methane clathrates.

Part - C

Generic 3 - Answer All Question

How many types of polymerisation are·possible in alkynes?

Write an account on the following reactions involving formation of alkane. (i) Kolbe's Electrolytic method (ii) Wurtz reaction (iii) Carey - House Mechanism

Predict the product for the following. (i) Benzene + H2 \(\rightarrow\) ? (ii) Benzene + CI2 \(\rightarrow\) ? (iii) Benzene + O2\(\rightarrow\) ? (iv) Benzene + Ch3Cl \(\rightarrow\) ? (v) C6H5COONa + NaOH \(\rightarrow\)?

Explain the carcinogenity and toxicity of aromatic hydrocarbons.

Explain how 2-butyne reacts with (a) Lindlar's catalyst and (b) Sodium in liquid ammonia?

Among anthracene and cyclopentadiene which is aromatic? Give reason for your answer.

Part - D

Generic 5 - Answer All Question

What are meta directors? Explain with suitable example

An organic compound (A) of a molecular formula C6H6 which is a simple aromatic hydrocarbon. A undergoes hydrogenation to give a cyclic compound (B). A reacts with chlorine in the presence of UV-light to give C which is used as insecticide. Identify A, Band C. Explain the reactions with equation

Write the mechanism for following reaction. \(\underset { (Propene) }{ { CH }_{ 3 }-CH={ CH }_{ 2 }+HBr } \overset { \left( { C }_{ 6 }{ H }_{ 5 }{ CO }_{ 2 } \right) { O }_{ 2 } }{ \longrightarrow } \underset { 1I-bromoprone }{ { CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 2 }-Br } \)

Explain the structure of benzene.

Explain in detail about the addition of hydrogen halide to an unsymmetrical alkene.

Give IUPAC names for the following compounds 1) CH3 – CH = CH – CH = CH – C ≡ C – CH3 2) 3) (CH3)3 C – C ≡ C – CH (CH3)2 4) ethyl isopropyl acetylene 5) CH ≡ C – C ≡ C – C ≡ CH

What happens when propene is treated with the following. (i) H2SO4 (ii) Ozone (iii) HBr (iv) Red hot Fe tube (v) Acidified KMnO4

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Suggest the route for the preparation of the following from benzene.
1) 3 – chloro nitrobenzene
2) 4 – chlorotoluene
3) Bromo benzene
4) m - dinitro benzene.

Write an account on the following reactions involving formation of alkane.
(i) Kolbe's Electrolytic method
(ii) Wurtz reaction
(iii) Carey - House Mechanism

Predict the product for the following.
(i) Benzene + H₂ \(\rightarrow\) ?
(ii) Benzene + CI₂ \(\rightarrow\) ?
(iii) Benzene + O₂\(\rightarrow\) ?
(iv) Benzene + Ch₃Cl \(\rightarrow\) ?
(v) C₆H₅COONa + NaOH \(\rightarrow\)?

Write the mechanism for following reaction.
\(\underset { (Propene) }{ { CH }_{ 3 }-CH={ CH }_{ 2 }+HBr } \overset { \left( { C }_{ 6 }{ H }_{ 5 }{ CO }_{ 2 } \right) { O }_{ 2 } }{ \longrightarrow } \underset { 1I-bromoprone }{ { CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 2 }-Br } \)

Give IUPAC names for the following compounds
1) CH₃ – CH = CH – CH = CH – C ≡ C – CH₃
2)
3) (CH₃)₃ C – C ≡ C – CH (CH₃)₂
4) ethyl isopropyl acetylene
5) CH ≡ C – C ≡ C – C ≡ CH

What happens when propene is treated with the following.
(i) H₂SO₄
(ii) Ozone
(iii) HBr
(iv) Red hot Fe tube
(v) Acidified KMnO₄