The Krafft temperature of a surfactant is the temperature:
Below which micelles decompose
At which the surfactant becomes completely insoluble
Above which the surfactant decomposes
Above which micelle formation becomes spontaneous
Related Questions
Soaps are prepared by the saponification of:
Carbohydrates.
Proteins.
Fats and oils.
Nucleic acids.
Commercial detergents contain mainly:
RONa
RCOONa
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
Soaps are sodium or potassium salts of:
Long chain fatty acids
Mineral acids
Short chain carboxylic acids
Inorganic bases
A soap can be obtained by the saponification of:
Liquid paraffin
Coconut oil
Lemongrass oil
Sandal wood
An unsaturated acid found in natural oils and fats is:
Palmitic acid
Myristic acid
Linoleic acid
Lauric acid
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
The term LABS abbreviates as:
Laboratory
Lauryl acidic benzene sulphate
Linear alkyl benzene sulphonate
None of the above
The process of forming micelles is driven by:
Hydrogen bonding.
Ionic interactions.
The hydrophobic effect.
Van der Waals forces.
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
