Generally Aldehydes behave as:

1. Oxidising agent

2. Reducing agent

3. Dehydration agent

4. Oxidizing as well as reducing agent

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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Compound (A) C5H10O forms a phenyl hydrazone and gives negative Tollen's and iodoform tests. Compound (A) on reduction gives n-pentane. Compound (A) is:

1. a primary alcohol

2. an aldehyde

3. a ketone

4. a secondary alcohol 

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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RCOOH RCH2OH. This mode of reduction of an acid to alcohol can be affected only by:

1. Zn/HCl

2. Na-alcohol

3. aluminium isopropoxide and isopropyl alcohol

4. LiAlH4

 

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 79%
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Ethyl ester ExcessCH3MgBr P. the product P will be: 

1. 

2. 

3.

4. 

Subtopic:  Aldehydes & Ketones: Preparation & Properties | Isomers & Reaction Mechanism |
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Which of the following has most acidic proton?

1. CH3COCH3                             

2. (CH3)2C=CH2

3. CH3COCH2COCH3                   

4. (CH3.CO)3CH

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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Which one of the following can be oxidised to the corresponding carbonyl compound?   [2004]

1. 2-hydroxy propane

2. Ortho-nitro phenol

3. propane

4. 2-methyl-2-hydroxy propane

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 69%
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Dry distillation of barium salt of Hexane-1,6-dicarboxylic acid gives:

1. 

2. 

3. 

4. 

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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Polarisation of electrons in acrolein may be written as             

1. Cδ+H2=CH-CH=Oδ-

2. Cδ+H2=Cδ+H-CH=O

3. Cδ+H2=CH-CH=Oδ+

4. Cδ+H2=CH-Cδ+H=O

 

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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Consider the following reaction;

CH3Br + Mg EtherAHCHOBHOHC

compound C is:

1. acetic acid

2. acetaldehyde

3. ethyl alcohol

4. formic acid

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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The conversion of CH3OH to CH3COOH can be brought in by:

1. K2Cr2O7/H+                           

2. CO + Rh

3. KMnO4                                   

4. H3PO4

Subtopic:  Carboxylic Acids: Preparation & Properties |
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