11th Chemistry Weekly Test - 4 ( Basic concept of organic reactions )

MABS Institution

11th Chemistry Weekly Test - 4 ( Basic concept of organic reactions )-Aug 2020

Time : 1.30 Hours

Part - A

Generic 3 - Answer All Question

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

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

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.

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

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.

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

Explain the substitution reaction in detail with suitable examples.

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

Distinguish between electrophiles and nucleophiles

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

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11th Chemistry Weekly Test - 4 ( Basic concept of organic reactions )

MABS Institution

11th Chemistry Weekly Test - 4 ( Basic concept of organic reactions )-Aug 2020

Part - A

Generic 3 - Answer All Question

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

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

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.

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

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.

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

Explain the substitution reaction in detail with suitable examples.

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

Distinguish between electrophiles and nucleophiles

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

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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

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 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