11th Chemistry Monthly Test - 1 ( Basic concept of organic reactions )

MABS Institution

11th Chemistry Monthly Test - 1 ( Basic concept of organic reactions )-Aug 2020

Time : 2.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Which one of the following is positively charged electrophiles?

CO₂
AlCl₃
BF₃
RX

Statement-I: Heterolytic cleavage is unsymmetrical one.
Statement-II: A covalent bond breaks and one of the bonded atom retains the bond pair of electrons.

Statement-I and II are correct and statement-II is correct explanation of statement-I.
Statement-I and II are correct but statement-II is not correct explanation of statement-I.
Statement-I is correct but statement-I! is wrong.
Statement-I is wrong but statement-II is correct

The correct statement for α-elimination is

It forms cyclic compounds
It forms carbene or substituted carbene
Two atoms are removed from α and β positions
In CHCl₃ α-elimination is not possible

Which one of the following has strongest acidic character?

HCOOH
CH₃COOH
CH₂CICOOH
CCl₃COOH

Which of the following species is not electrophilic in nature?

Cl⁺
BH₃
H₃O⁺
⁺NO₂

The most stable carbocation is

\(C{ H }_{ 3 }-\overset { + }{ C } { H }_{ 2 }\)
\(C{ H }_{ 3 }-\overset { + }{ C } H-C{ H }_{ 3 }\)
\(C{ H }_{ 2 }=CH-\overset { + }{ C } { H }_{ 2 }\)
\(\overset { + }{ C } { H }_{ 3 }\)

Which one of the following is not nucleophile?

H₂O
NH₃
R-OH
FeCl₃

: CH₂ is an

Electrophile
Nucleophile
Free Radical
Ambiphiles

Which of the following compounds will not undergo Friedal-craft's reaction easily?

Xylene
Nitrobenzene
Toluene
Cumene

Which one of the following species has tendency to show-I effect?

^-CH₃
^-CH₂^-CH₃
^-CH(CH³)₂
^-C₆H₅

Part - B

Generic 2 - Answer All Question

When does the carbon in an alkene molecule acquires a positive charge? Explain.

Explain electromeric effect.

Write a short notes on positive mesomeric effect?

Classify the following reactions in one of the reaction type studied in this unit.
(i) \(C{ H }_{ 3 }C{ H }_{ 2 }Br+H\overset { - }{ S } \longrightarrow C{ H }_{ 3 }C{ H }_{ 2 }SH+Br\)
(ii) \({ \left( C{ H }_{ 3 } \right) }_{ 2 }C=C{ H }_{ 2 }+HCl\longrightarrow { \left( C{ H }_{ 3 } \right) }_{ 2 }CCl-C{ H }_{ 3 }\)
(iii) \(C{ H }_{ 3 }-C{ H }_{ 2 }Br+H\overset { - }{ O } \longrightarrow C{ H }_{ 2 }=C{ H }_{ 2 }+{ H }_{ 2 }O+Br\)
(iv) \({ \left( { CH }_{ 3 } \right) }_{ 3 }C-C{ H }_{ 2 }OH+HB\longrightarrow { \left( C{ H }_{ 3 } \right) }_{ 2 }CBr-C{ H }_{ 2 }-C{ H }_{ 3 }+{ H }_{ 2 }O\)
How will you convert benzene into cyclohexane?

How will substitution reactions die classified?

Predict the product for the following reaction.
(i)

(ii)

(iii)

How will you distinguish between electrophiles and nucleophiles?

Mention the types of fission of a covalent bond?

Which of the following ions is more stable? Use resonance to explain your answer.

Part - C

Generic 3 - Answer All Question

Which bond is more polar in the following pair of molecular?
(i) H₃C-H (or) H₃C-Br
(ii) H₃C-NH₂ (or) H₃C-OH
(iii) H₃C-OH (or) H₃C-SH

What are the possible types of electron movement? Represent them by clearly indicating the electron shift.

Distinguish between electrophiles and nucleophiles

Explain the substitution reaction in detail with suitable examples.

Discuss the reason behind the classification of inductive effect into +I and -I effect.

Carry over the following reaction mechanisms.
(i) Bromination of alkene
(ii) Addition of HCN to CH₃CHO
(iii) Formation of alkyl bromide with benzoyl peroxide as radical initiator.
Write structures of various carbocations that can be obtained from 2-methyl butane. Arrange these carbocations in order of increasing stability.

Which of the following compounds will not exist as resonance hybrid? Give reason for your answer.
(i) CH₃ - OH
(ii) R-CONH₂
(iii) CH₃-CH = CH-CH₂NH₂

While writing the resonance structures, what are the rules to be followed?

The structure of triphenylmethyl cation is given below. This very stable and some of its salts can be stored for months. Explain the cause of high stability of this cation.

Part - D

Generic 5 - Answer All Question

Explain the types of addition reactions?

Give a detailed account on homolytic and heterolytic cleavage.

How does hyper conjugation effect explain the stability of alkenes?

Explain the types of substitution reaction?

Explain the acidic nature of phenol.

An organic compound (A) has a molecular formula C₂H₆0 it is one of the primary alcohol. A reacts with acidified potassium dichromate to give B. B on further undergoes to oxidation reaction to give C. C on reacts with SOCl₂ to give D which is chlorinated product. Identify A,B,C and D, explain with equation.

Complete the reactions and identify the products.
(i)

(ii)
\({ CH }_{ 3 }-\underset { \overset { | }{ Cl } }{ C } H-{ CH }_{ 3 }\overset { { H }^{ + }/{ K }_{ 2 }{ Cr }_{ 2 }{ O }_{ 7 } }{ \longrightarrow } A\overset { (O)) }{ \longrightarrow } B\)

An organic compound (A) of a molecular formula C₂H₄ which is a simple alkene. A reacts with dil H₂SO₄ to give B. A again reacts with Cl₂ to give C. Identify A,B and C and write the equations.
How does inductive effect influence the reactivity and acidity of carboxylic acids?

Explain electron movement in organic reactions.

Comment

Add Comment

InstaQB

Institutions

12th Standard English Medium

12th Standard Tamil Medium

11th Standard English Medium

11th Standard Tamil Medium

10th Standard English Medium

9th Standard English Medium

8th Standard English Medium

7th Standard English Medium

Class XII

Class XI

12Th Standard

11Th Standard

10Th Standard

9Th Standard

11th Chemistry Monthly Test - 1 ( Basic concept of organic reactions )

MABS Institution

11th Chemistry Monthly Test - 1 ( Basic concept of organic reactions )-Aug 2020

Part - A

Multiple Choice Question - Answer All Question

Which one of the following is positively charged electrophiles?

Statement-I: Heterolytic cleavage is unsymmetrical one. Statement-II: A covalent bond breaks and one of the bonded atom retains the bond pair of electrons.

The correct statement for α-elimination is

Which one of the following has strongest acidic character?

Which of the following species is not electrophilic in nature?

The most stable carbocation is

Which one of the following is not nucleophile?

: CH2 is an

Which of the following compounds will not undergo Friedal-craft's reaction easily?

Which one of the following species has tendency to show-I effect?

Part - B

Generic 2 - Answer All Question

When does the carbon in an alkene molecule acquires a positive charge? Explain.

Explain electromeric effect.

Write a short notes on positive mesomeric effect?

How will you convert benzene into cyclohexane?

How will substitution reactions die classified?

Predict the product for the following reaction. (i) (ii) (iii)

How will you distinguish between electrophiles and nucleophiles?

Mention the types of fission of a covalent bond?

Which of the following ions is more stable? Use resonance to explain your answer.

Part - C

Generic 3 - Answer All Question

Which bond is more polar in the following pair of molecular? (i) H3C-H (or) H3C-Br (ii) H3C-NH2 (or) H3C-OH (iii) H3C-OH (or) H3C-SH

What are the possible types of electron movement? Represent them by clearly indicating the electron shift.

Distinguish between electrophiles and nucleophiles

Explain the substitution reaction in detail with suitable examples.

Discuss the reason behind the classification of inductive effect into +I and -I effect.

Carry over the following reaction mechanisms. (i) Bromination of alkene (ii) Addition of HCN to CH3CHO (iii) Formation of alkyl bromide with benzoyl peroxide as radical initiator.

Write structures of various carbocations that can be obtained from 2-methyl butane. Arrange these carbocations in order of increasing stability.

Which of the following compounds will not exist as resonance hybrid? Give reason for your answer. (i) CH3 - OH (ii) R-CONH2 (iii) CH3-CH = CH-CH2NH2

While writing the resonance structures, what are the rules to be followed?

The structure of triphenylmethyl cation is given below. This very stable and some of its salts can be stored for months. Explain the cause of high stability of this cation.

Part - D

Generic 5 - Answer All Question

Explain the types of addition reactions?

Give a detailed account on homolytic and heterolytic cleavage.

How does hyper conjugation effect explain the stability of alkenes?

Explain the types of substitution reaction?

Explain the acidic nature of phenol.

Complete the reactions and identify the products. (i) (ii) \({ CH }_{ 3 }-\underset { \overset { | }{ Cl } }{ C } H-{ CH }_{ 3 }\overset { { H }^{ + }/{ K }_{ 2 }{ Cr }_{ 2 }{ O }_{ 7 } }{ \longrightarrow } A\overset { (O)) }{ \longrightarrow } B\)

An organic compound (A) of a molecular formula C2H4 which is a simple alkene. A reacts with dil H2SO4 to give B. A again reacts with Cl2 to give C. Identify A,B and C and write the equations.

How does inductive effect influence the reactivity and acidity of carboxylic acids?

Explain electron movement in organic reactions.

Comment

Other Study material

11th Chemistry Monthly Test - 3 ( Solutions )

11th Chemistry Monthly Test - 4 ( Environmental Ch

11th Chemistry Weekly Test - 2 ( Chemical bonding

11th Chemistry Weekly Test - 1 ( Chemical bonding

11th Chemistry Monthly Test - 4 ( Solutions )

11th Chemistry Weekly Test - 4 ( Physical and Chem

11th Chemistry Monthly Test - 1 ( Physical and Che

11th Chemistry Monthly Test - 2 ( Physical and Che

11th Chemistry Monthly Test - 3 ( Physical and Che

11th Chemistry Monthly Test - 4 ( Physical and Che

11th Chemistry Weekly Test - 1 ( Solutions )

11th Chemistry Weekly Test - 2 ( Solutions )

11th Chemistry Weekly Test - 3 ( Solutions )

Statement-I: Heterolytic cleavage is unsymmetrical one.
Statement-II: A covalent bond breaks and one of the bonded atom retains the bond pair of electrons.

: CH₂ is an

Predict the product for the following reaction.
(i)

(ii)

(iii)

Which bond is more polar in the following pair of molecular?
(i) H₃C-H (or) H₃C-Br
(ii) H₃C-NH₂ (or) H₃C-OH
(iii) H₃C-OH (or) H₃C-SH

Carry over the following reaction mechanisms.
(i) Bromination of alkene
(ii) Addition of HCN to CH₃CHO
(iii) Formation of alkyl bromide with benzoyl peroxide as radical initiator.

Which of the following compounds will not exist as resonance hybrid? Give reason for your answer.
(i) CH₃ - OH
(ii) R-CONH₂
(iii) CH₃-CH = CH-CH₂NH₂

Complete the reactions and identify the products.
(i)

(ii)
\({ CH }_{ 3 }-\underset { \overset { | }{ Cl } }{ C } H-{ CH }_{ 3 }\overset { { H }^{ + }/{ K }_{ 2 }{ Cr }_{ 2 }{ O }_{ 7 } }{ \longrightarrow } A\overset { (O)) }{ \longrightarrow } B\)

An organic compound (A) of a molecular formula C₂H₄ which is a simple alkene. A reacts with dil H₂SO₄ to give B. A again reacts with Cl₂ to give C. Identify A,B and C and write the equations.