Which of the following is the correct representation for intermediate of nucleophilic addition reaction to the given carbonyl compound (A) :

a. 

b. 

c. 

d. 

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Isomers & Reaction Mechanism |
 78%
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Addition of water to alkynes occurs in acidic medium and in the presence of Hg2+ ions as a catalyst. Which of the following products will be formed on addition of water to but-1-yne under these conditions?

1.
2.
3.
4.
Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 69%
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The most reactive compound among the following toward nucleophilic addition reaction is:

1. 2.
3. 4.
Subtopic:  Isomers & Reaction Mechanism |
 70%
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The correct order of increasing acidic strength is:

1. phenol < ethanol < chloroacetic acid < acetic acid
2. ethanol < phenol < chloroacetic acid < acetic acid
3. ethanol < phenol < acetic acid < chloroacetic acid
4. chloroacetic acid < acetic acid < phenol < ethanol

Subtopic:  Carboxylic Acids: Preparation & Properties |
 82%
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Compound can  be prepared by the reaction of-
1. Phenol and benzoic acid in the presence of NaOH
2. Phenol and benzoyl chloride in the presence of pyridine
3. Phenol and benzoyl chloride in the presence of ZnCl2
4. Phenol and benzaldehyde in the presence of palladium

Subtopic:  Carboxylic Acids: Preparation & Properties |
 54%
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The reagent which does not react with both, acetone and benzaldehyde?

1. Sodium hydrogen sulphite   

2. Phenyl hydrazine

3. Fehling's solution                 

4. Grignard reagent

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 78%
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Cannizzaro’s reaction is not given by:
 

1.  2.
3. HCHO 4. CH3CHO
Subtopic:  Name Reaction |
 76%
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The compound below is treated with a concentrated aqueous KOH solution. The products obtained are:

1.
2.
3.
4.
Subtopic:  Name Reaction |
 85%
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The structure of ‘A’ and the type of isomerism with the final product
in the above reaction are respectively: 

1. Prop-1-en-2-ol and Metamerism
2. Prop-1-en-1-ol and Tautomerism
3. Prop-2-en-2-ol and Geometrical isomerism
4. Prop-1-en-2-ol and Tautomerism

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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Compounds A and C in the following reaction are:

\(\mathrm{\small{{CH}_3 {CHO} \xrightarrow[{(ii) ~H_{2}O}]{(i) ~CH_{3}MgBr}({A}) \stackrel{{H}_2 {SO}_4}{\longrightarrow}({B}) \xrightarrow[]{Hydroboration \ oxidation}(C)}}\)

1.  Identical                               

2.  Positional isomers

3.  Functional isomers       

4.  Optical isomers

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 68%
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