Chemistry : Alcohols, Phenols and Ethers

The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with

• PCl₃

• PCl₅

• SOCl₂ in presence of pyridine

• dry HCl in the presence of anhydrous ZnCl₂

Ethyl alcohol reacts with thionyl chloride to give

• CH₃CH₂Cl + HCl

• CH₃CH₂Cl + H₂O + SO₂

• CH₃CH₂Cl +HCl + SO₂

• CH₃CH₂Cl +SO₂ + Cl₂

Primary alcohols can be obtained from the reaction of R Mg X with

• CO₂

• HCHO

• CH₃CHO

• H₂O

The best method to separate the mixture of ortho and para nitrophenol (1 : 1) is

• vaporisation

• colour spectrum

• distillation

• crystallisation

Which is used in alcoholic beverages ?

• Methanol

• Ethanol

• Phenol

• Glycerol

Lucas reagent is

• anhy. ZnCl₂ and NH₃

• anhy. ZnCl₂ and CaCl₂

• anhy. ZnCl₂ and conc. HCl

• anhy. ZnCl₂ and conc. HCl gas

The enzyme which can catalyse the conversion of glucose to ethanol is

• zymase

• invertase

• maltase

• diastase

Hydrolysis of phenyl isocyanide forms

• benzoic acid

• formic acid

• acetic acid

• None of these

Reaction of ethyl formate with excess of CH₃MgI followed by hydrolysis gives

• n-propyl alcohol

• isopropyl alcohol

• acetaldehyde

• acetone

Which among the following alcohols is most reactive with sodium wire?

• Ethanol

• 2-Propanol

• 2-Butanol

• 2-Methyl-2-butanol