sufactants and lubricants

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