31.

Methanol and ethanol are miscible in water due to

• covalent character

• hydrogen bonding character

• oxygen bonding character

• None of the above

Freon used as refrigerant is

• CF₂=CF₂

• CH₂F₂

• CCl₂F₂

• CF₄

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

Which of the following does not reduce Fehling's solution?

• Benzaldehyde

• Formic acid

• Glucose

• Fructose

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

Styrene can be purified by

• simple distillation

• fractional distillation

• steam distillation

• vacuum distillation

Which of the following is not reducing sugar?

• Glucose

• Fructose

• Lactose

• Sucrose

The monomer of teflon is

• CHF = CH₂

• CF₂ = CF₂

• CHCl = CHCl

• CHF = CHCl