The best method to prepare cyclohexene from cyclohexanol is by using:

1. conc. HCl + ZnCl2 2. conc. H3PO4
3. HBr 4. conc. HCl

Subtopic:  Alcohols: Preparation & Properties | Mechanism of Dehydration, Methanol & Ethanol |
 69%
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Which of the following is most acidic?

1. p-cresol                               

2. p-chlorophenol

3. p-nitrophenol                       

4. p-aminophenol

Subtopic:  Alcohols: Preparation & Properties |
 90%
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ZPCl5XAlc.KOHY2. H2O; boil1. Conc. H2SO4Z is:

1. CH3-CH2-CH2-OH

2. CH3-C|H-CH3
            OH

3. (C2H5)3C-OH

4. CH3-CH=CH2

Subtopic:  Alcohols: Preparation & Properties |
 59%
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The alkyl halide is converted into an alcohol by 

1. addition                           

2. substitution

3. dehydrohalogenation         

4. elimination

Subtopic:  Alcohols: Preparation & Properties |
 80%
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Glycerol on warming with excess of HI:

1. 2-iodopropane

2. 1-iodopropane

3. 1,2,3-tri-iodopropane

4. none of the above

Subtopic:  Alcohols: Preparation & Properties |
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Dehydrogenation of 2-butanol gives:

1. 2-Butene                                         

2. Butanone

3. Butyraldehyde                                 

4. 1-Butene

Subtopic:  Mechanism of Dehydration, Methanol & Ethanol |
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The compound having lowest boiling point among the following is -

1. Phenol                                 

2. o-Nitrophenol

3. m-Nitrophenol                       

4. p-Nitrophenol

Subtopic:  Phenols: Preparation & Properties |
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Oxidation of 2-propanol by K2Cr2O7 and dilute H2SO4 leads to the formation of:

1. Propanal                     

2. Propanoic acid

3. Methanoic acid             

4. Propanone

Subtopic:  Mechanism of Dehydration, Methanol & Ethanol |
 63%
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A compound X with molecular formula C3H8O can be oxidised to a compound Y with the molecular formula C3H6O2. X is most likely to be:

1. Primary alcohol                     

2. Secondary alcohol

3. Aldehyde                               

4. Ketone

Subtopic:  Mechanism of Dehydration, Methanol & Ethanol |
 66%
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The ionisation constant of phenol is higher than that of ethanol because -                   

1. Phenoxide ion is bulkier than ethoxide

2. Phenoxide ion is a stronger base than ethoxide

3. Phenoxide ion is stabilised through delocalisation

4. Phenoxide ion is less stable than ethoxide

Subtopic:  Alcohols: Preparation & Properties | Phenols: Preparation & Properties |
 81%
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