Methanol and ethanol are miscible in water due to
covalent character
hydrogen bonding character
oxygen bonding character
None of the above
B.
hydrogen bonding character
Methanol and ethanol are miscible in water due to hydrogen bonding character.
Which of the following is not reducing sugar?
Glucose
Fructose
Lactose
Sucrose
D.
Sucrose
Sucrose is not a reducing sugar because it does not have an OH group attached to the anomeric carbon, so they cannot reduce other compounds.
The enzyme which can catalyse the conversion of glucose to ethanol is
zymase
invertase
maltase
diastase
A.
zymase
Zymase is an enzyme which can catalyse the conversion of glucose to ethanol. It catalyzes the fermentation of sugar into ethanol and CO2. It is naturally found in yeasts.
Reaction of ethyl formate with excess of CH3MgI followed by hydrolysis gives
n-propyl alcohol
isopropyl alcohol
acetaldehyde
acetone
C.
acetaldehyde
Acetaldehyde is formed when ethyl formate reacts with excess of CH3MgI.
Styrene can be purified by
simple distillation
fractional distillation
steam distillation
vacuum distillation
D.
vacuum distillation
Styrene can be purified using a process called vacuum distillation.
Which of the following does not reduce Fehling's solution?
Benzaldehyde
Formic acid
Glucose
Fructose
D.
Fructose
Fructose does not reduce Fehling's solution because it contains ketonic group.
Freon used as refrigerant is
CF2=CF2
CH2F2
CCl2F2
CF4
C.
CCl2F2
The chloroflurocarbon compounds of methane and ethane are collectively known as freons. It is CCl2F2 and is used as a refrigerant.
Lucas reagent is
anhy. ZnCl2 and NH3
anhy. ZnCl2 and CaCl2
anhy. ZnCl2 and conc. HCl
anhy. ZnCl2 and conc. HCl gas
C.
anhy. ZnCl2 and conc. HCl
Lucas reagent is anhydrous ZnCl2 and conc. HCl. It is used to differentiate the primary, secondary and tertiary alcohol.
The monomer of teflon is
CHF = CH2
CF2 = CF2
CHCl = CHCl
CHF = CHCl
B.
CF2 = CF2
Tetrafluoroethene is the monomer of teflon.
nCF2 CF2 (-CF2 - CF2-)n
teflon
Hydrolysis of phenyl isocyanide forms
benzoic acid
formic acid
acetic acid
None of these
B.
formic acid
Hydrolysis of phenyl isocyanide forms formic acid.
+ 2H2O +