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Worksheetssufactants and lubricants
Total questions: 15
Worksheet time: 8mins
If the carbon chain is linear, the corresponding detergent will be?
Soft and non-biodegradable
Soft and biodegradable
Hard and biodegradable
Hard and non-biodegradable
Which of the following is an example of cationic detergent?
Alkyltrimethyl ammonium chloride
Sodium salts of alkyl sulphates
Sodium salts of alkyl benzene sulphonic acids
Polyethers
Micelles behave as colloids only when?
Concentration is less than CMC
Concentration is equal to CMC
Concentration is greater than CMC
They always behave as colloids
lubricants used for boundary should have?
low viscosity
high resistance to heat
low resistance to oxide
bad oiliness
viscosity of liquids varies with temperature as:
Increases with increase in temperature
decreases with increase in temperature
remains constant
none
The flash points are ____ higher than fire points
5 to 40F
100 to 200F
40 to 5F
none
saponification value depends on:
normality of oil sample
molarity of oil sample
weight of oil sample
molality of oil sample
Thick film lubrication is also called:
hydrostatic lubrication
fluid film lubrication
boundary lubrication
none
Which of the following is/are the additives for lubricant?
polymethacrylates
Tricresyl phosphate
Hexanol
all of the above
Sodium laurel Sarcosinate is an example of____
Anionic surfactants
Cationic surfactants
Non-ionic surfactants
Zwitter ionic surfactants
.Most micelles are spherical and contain between_____surfactant monomers
0-50
50-100
150-200
1500-2000
which of the following methods used to determine CMC?
conductivity method
Turbidity method
Osmotic Pressure
all of the above
Select the incorrect statement from the following options.
In the micelle formation, the water soluble heads are directed towards the centre
In the micelle formation, the water soluble heads are on the surface in contact with the water
In the micelle formation, the water insoluble tails are directed towards the centre
None of the mentioned
Forces responsible for phenomenon of surface tension between liquid molecules
adhesive forces
cohesive forces
ion-dipole forces
dipole-dipole forces
Among these select a possible surfactant combination gropus
-COOH,-OSO3H
-COOH,SO3H
-SO3H,(SiR2-O-)
(-CH2-CH2-CH2-O-)n,(CF2)n
