Cyclohexanone forms cyanohydrin in a good yield, but 2,2,6-trimethylcyclohexanone does not. It is due to:

1. Low electrophilicity in 2,2,6-trimethylcyclohexanone

2. Less steric crowd in  2,2,6-trimethylcyclohexanone

3. More steric crowd in  2,2,6-trimethylcyclohexanone

4. High electrophilicity in 2,2,6-trimethylcyclohexanone

Subtopic:  Name Reaction |
 76%
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There is only one –NH2 group involved in semicarbazone formation out of two –NH2 group. It is due to:

1. Resonance  of one type of –NH2 group

2. Inductive effect of one type of –NH2 group

3. Hyperconjugation of one type of –NH2 group

4. Reverse hyperconjugation of one type of -NH2 group

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 68%
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What type of reaction is demonstrated by the process involving a carboxylic acid, an alcohol, and an acid that results in the formation of esters?

1. Reversible slow process 2. Irreversible fast process
3. Cyclic process 4. Adiabatic process
Subtopic:  Acid Derivatives - Preparation, Properties & Uses |
 76%
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The below reaction is an example of

\(CH_{3}CH_{2}OH \ + \ CH_{3}COCl \xrightarrow[]{\textbf{Pyridine}} \)
\( CH_{3}COOC_{2}H_{5} \ + \ HCl\)

1. Acetylation

2. Benzoylation

3. Cross aldol condensation

4. Cross Cannizzaro reaction

Subtopic:  Acid Derivatives - Preparation, Properties & Uses |
 80%
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What is the correct sequence of reagents used for the preparation of m-Nitrobenzoic acid from benzene?

 

(a) Mg/ Dry ether
(b) Br2 / FeBr3
(c) COH3O+
(d) HNO3 + H2SO4
 
1. (a) (b) (c) (d)
2. (b) (a) (c) (d)
3. (c) (b) (a) (d)
4. (d) (b) (a) (c)
Subtopic:  Name Reaction |
 57%
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The correct sequence of reagents used for the preparation of  Phenylacetic acid from benzene are :

1. a= NBS, hv, and heat; b= CH3Cl/Anhyd.AlCl3C= KMnO4+KOH; d=H3O+
2. a= CH3Cl/Anhyd.AlCl3b=  KMnO4+KOH; C=  NBS, hv, and heat; d=H3O+
3. a= CH3Cl/Anhyd.AlCl3b=  NBS, hv, and heat; C= H3O+d=KMnO4+KOH
4.  a= CH3Cl/Anhyd.AlCl3b=  NBS, hv, and heat; C= alc.KCN; d=H

Subtopic:  Name Reaction |
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The correct sequence of reagents used to yield p-Nitrobenzaldehyde from benzene is:

(a) CH3Cl /Anhyd. AlCl3
(b) HNO3 /H2SO
(c) CS2 / CrO2Cl2
(d) H3O+
 
1. (a) (b) (c) (d)
2. (c) (b) (a) (d)
3. (b) (a) (c) (d)
4. (a) (b) (d) (c)

Subtopic:  Name Reaction |
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Chemical test(s) to distinguish between the Propanal and Propanone is :

1. Tollen’s test

2. Fehling’s test

3. Iodoform test

4. All of the above

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 72%
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Chemical test(s) used to distinguish between Acetophenone and Benzophenone is :

1. Tollen’s test

2. Fehling’s test

3. Iodoform test

4. All of the above

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 70%
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A chemical test to distinguish between Phenol and Benzoic acid is :

1. Tollen’s test

2. Fehling’s test

3. Iodoform test

4. Ferric chloride test

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 81%
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