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Worksheets*PHYSICAL PROPERTIES OF ORGANIC COMPOUNDS (SERIES 1)*
Total questions: 18
Worksheet time: 36mins
Select the incorrect statement regarding the boiling points of alkanes
Boiling point increases with stronger Van der Waal’s forces
Surface area is the only factor which determines the boiling point of alkane
Boiling point of straight chain alkanes is greater than that of branched chain alkanes
The boiling point of cycloalkanes is always higher than that of linear alkanes
Which compound has the highest boiling point?
CH3CH2CH2CH3
CH3CH2COH
CH3CH2OCH3
CH3CH2CH2OH
Which is most soluble in water?
CH3CH2CH2CH3
CH3CH2COH
CH3CH2OCH3
CH3CH2CH2OH
Which compound has the highest boiling point?
butan-1-ol
butanal
butanone
butanoic acid
Which alcohol is most soluble in water?
propan-1-ol
pentan-2-ol
isobutyl alcohol
tert-butyl alcohol.
Which of the following families of organic compound is least soluble in water?
ethers
alcohols
carboxylic acids
primary amines
Which is NOT a physical property of alcohols or phenols?
Phenols are generally only slightly soluble in water.
The solubilities of normal primary alcohols in water decrease with increasing molecular weight.
The hydroxyl group of an alcohol is nonpolar.
Due to hydrogen bonding, boiling points of alcohols are much higher than those of corresponding alkanes.
Which type of the strongest of attractive forces?
Van der Waals forces
Dipole-dipole forces
Cation-anion forces
Hydrogen bonds
This alkane is predicted to have the highest melting point of those shown:
CH3CH2CH2CH3
CH3CH(CH3)CH3
CH3CH(CH3)CH2CH3
CH3C(CH3)2CH3
Which of the following is not found in the following substance?
CH3CH2CH2CH2CH2OH
Van der Waals
Dipole-dipole
Resonance
Hydrogen bonding
Which compound would have the lowest boiling point?
I
II
III
IV
Which of the following carboxylic acids has the highest boiling point?
heptanoic acid
octanoic acid
nonanoic acid
decanoic acid
Which is the correct order of boiling points of carboxylic acids, from the lowest to the highest?
methanoic acid, ethanoic acid, butanoic acid, propanoic acid
methanoic acid, propanic acid, butanoic acid, ethanoic acid
methanoic acid, ethanoic acid, propanoic acid, butanoic acid
ethanoic acid, methanoic acid, propanoic acid, butanoic acid
What is the main reason carboxylic acid has the highest boiling point as compared to other compounds with comparable mass?
It has carboxyl functional group.
It is a strong acid.
It exists in a form of dimer structure
It can form Van der Waals forces
What factor can decrease the solubility of carboxylic acid in water?
The increase in length of the hydrocarbon chain.
The decrease in length of the hydrocarbon chain.
The increase in number of carboxyl group.
The number of hydrogen bond.
Why do alkanes not dissolve in water?
they are less dense than water
they have low melting points
they are non-polar compounds
they are chemically less reactive
Why ethanol more soluble in water than propanol?
because can form more hydrogen bond with water molecules
because can form dimer structure
because less hydrophobic areas
because more hydrophilic areas
Arrange the compounds increasing boiling point?
ethanol, 1,2-propanadiol , butanoic acid, propane
propane < ethanol < butanoic acid < 1,2-propandiol
ethanol < propane < butanoic acid < 1,2-propandiol
propane < ethanol < 1,2-propandiol < butanoic acid
1,2-propandiol < propane < ethanol < butanoic acid
