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

1. conc. HCl + ZnCl2                     

2.  conc. H3PO4

3. HBr                                           

4. conc. HCl

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Alcohols: Preparation, Physical and Chemical Properties
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Propene, CH3-CH=CH2 can be converted into 1-propanol by oxidation. Indicate which set of reagents amongst the following is ideal to affect the above conversion?                         

1. KMnO4 (alkaline)

2. Osmium tetroxide (OsO4/CH2Cl2)

3. B2H6 and alk H2O2

4. O3/Zn

Concept Questions :-

Alcohols: Preparation, Physical and Chemical Properties
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Which of the following is most acidic?

(a) p-cresol                                (b) p-chlorophenol

(c) p-nitrophenol                        (d) p-aminophenol

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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

Concept Questions :-

Alcohols: Preparation, Physical and Chemical Properties
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The alkyl halide is converted into an alcohol by 

(a) addition                            (b) substitution

(c) dehydrohalogenation          (d) elimination

Concept Questions :-

Alcohols: Preparation, Physical and Chemical Properties
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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

Concept Questions :-

Alcohols: Preparation, Physical and Chemical Properties
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Dehydrogenation of 2-butanol gives:

(a) 2-butene                                         (b) butanone

(c) butyraldehyde                                  (d) 1-butene

Concept Questions :-

Mechanism of Dehydration, Uses, Methanol and Ethanol
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Which of the following has lowest boiling point?

(a) Phenol                                  (b) o-nitrophenol

(c) m-nitrophenol                       (d) p-nitrophenol

Concept Questions :-

Phenols: Preparation, Properties, Acidic Nature of Phenol
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Oxidation of 2-propanol by K2Cr2O7 and dilute H2SO4 leads to the formation of:

(a) propanal                      (b) propanoic acid

(c) methanoic acid             (d) propanone

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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

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