Ethane can be obtained from ethanal in one step by:

1. Na-Hg + water

2. Zn-Hg + conc.HCl

3. aluminium isopropoxide and isopropyl alcohol

4. LiAlH4 + ether

 

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 77%
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Which one of the following compounds on treatment with LiAlH4 will give a product that will give a positive iodoform test?

1. CH3CH2CHO                             

2. CH3CH2COOCH3

3. CH3CH2OCH2CH                     

4. CH3COCH3

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 64%
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Aldehydes and ketones will not form crystalline derivatives with                   

1. sodium bisulphite

2. phenyl hydrazine

3. semicarbazide hydrochloride

4. dihydrogen sodium phosphate

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 57%
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Oxalic acid on treatment with conc. H2SO4 gives:

1. CO + H2O2                           

2.  H2O +CO+CO2

3. HCOOH + CO2                       

4.  HCOOH + CO2 +O2

Subtopic:  Carboxylic Acids: Preparation & Properties |
 58%
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Benzene sulphonic acid on treating with P2O5 gives:

1. salicylic acid 

2. benzoic acid

3. acid anhydride

4. sodium benzoate

 

Subtopic:  Carboxylic Acids: Preparation & Properties |
 52%
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The IUPAC name of crotonaldehyde is:

1. But-2-en-1-al

2. Prop-2-enal

3. 4-Methylpent-3-en-2-one

4. None of the above

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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The IUPAC name of tartaric acid is:

1. 2,3-dihydroxy butane-1, 4-dioic acid

2. 1,4-dihydroxy butane-2-3-dioic acid

3. butane-1 4-dicarboxylic acid

4. none of the above

Subtopic:  Carboxylic Acids: Preparation & Properties |
 60%
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Cyanohydrin of which compound gives lactic acid on hydrolysis?

1. Acetone                                 

2. Acetaldehyde

3. Propanal                                 

4. HCHO

Subtopic:  Isomers & Reaction Mechanism |
 68%
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Which of the following is the strongest acid?

1. HCOOH (pKa 3.77)

2. C6H5COOH (pKa 4.22)

3. CH3COOH (pKa 4.71)

4. CH3CH2COOH (pKa 4.88)

Subtopic:  Carboxylic Acids: Preparation & Properties |
 87%
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Formaldehyde can be distinguished from acetaldehyde by:

1. Fehling's solution

2. Schiff's reagent

3. Ammonia

4. Ammoniacal AgNO3

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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