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

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

Which of the following is most acidic?

1. p-cresol                               

2. p-chlorophenol

3. p-nitrophenol                       

4. p-aminophenol

Z$\stackrel{{\mathrm{PCl}}_5}{\to }$X$\stackrel{\mathrm{Alc}.\mathrm{KOH}}{\to }$Y$\underset{2. {\mathrm{H}}_2\mathrm{O}; \mathrm{boil}}{\overset{1. \mathrm{Conc}. {\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}$Z is:

1. CH₃-CH₂-CH₂-OH

2. ${\mathrm{CH}}_3-\underset{|}{\mathrm{C}}\mathrm{H}-{\mathrm{CH}}_3$
$\mathrm{OH}$

3. (C₂H₅)₃C-OH

4. CH₃-CH=CH₂

The alkyl halide is converted into an alcohol by 

1. addition                           

2. substitution

3. dehydrohalogenation         

4. elimination

Glycerol on warming with excess of HI:

1. 2-iodopropane

2. 1-iodopropane

3. 1,2,3-tri-iodopropane

4. none of the above

When 2-butanol is passed over heated copper at 573 K, it undergoes dehydrogenation to form:

1. 2-Butene                                         

2. Butanone

3. Butyraldehyde                                 

4. 1-Butene

The compound having lowest boiling point among the following is -

1. Phenol                                 

2. o-Nitrophenol

3. m-Nitrophenol                       

4. p-Nitrophenol

Oxidation of 2-propanol by K₂Cr₂O₇ and dilute H₂SO₄ leads to the formation of:

1. Propanal                     

2. Propanoic acid

3. Methanoic acid             

4. Propanone

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

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