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A novel detergent is synthesized with a branched alkyl chain. Compared to a linear-chain detergent with the same number of carbon atoms, the branched detergent will likely exhibit:
increased solubility in water
a lower critical micelle concentration (CMC)
greater foaming capacity
a higher melting point
Which combination of factors would MOST effectively enhance the cleansing action of a soap in hard water?
Decreased temperature and addition of NaCl
Increased temperature and addition of NaCl
Decreased temperature and addition of a chelating agent
Increased temperature and addition of a chelating agent
Which statement regarding cationic detergents is FALSE?
They possess a positively charged hydrophilic head group.
They are often used as fabric softeners and germicides.
They are effective cleaning agents in hard water due to their insensitivity to calcium and magnesium ions.
Their effectiveness is reduced by anionic surfactants.
Which of the following is NOT a characteristic of soaps?
They are sodium or potassium salts of long-chain fatty acids.
They work effectively in hard water.
They have a hydrophilic head and a hydrophobic tail.
They form micelles in water.
Detergents are preferred over soaps in hard water because:
They are cheaper to produce.
They do not form insoluble precipitates with calcium and magnesium ions.
They are less effective cleaning agents.
They have a stronger odor.
Detergents are more effective than soaps in hard water because:
They are more biodegradable
They do not form insoluble precipitates with calcium and magnesium ions
They have a longer hydrocarbon chain
They are cheaper to produce
Detergents are better cleansing agent than soaps because:
They wash clothes better
Absorb the hardness of water
They are less affected by hard water
They are less soapy
Detergents are better cleansing agent than soaps because:
They wash clothes better
Absorb the hardness of water
They are less affected by hard water
They are less soapy
Soaps do not form froths easily from hard water because:
Of formation of insoluble salts
Of formation of complex salts
Of lower solubility of soaps in hard water
None of the above
