At the critical micelle concentration (CMC) the surfactant molecules:
1. Associate
2. Dissociate
3. Decompose
4. Become completely soluble
According to Hardy Schulze law, the order of coagulation power of cations will be:
1.
2.
3.
4.
Which one of the following methods is commonly used method for destruction of colloid:
1. Dialysis
2. Condensation
3. Filtration by animal membrane
4. By adding electrolyte
Which of the following is correct:
1. Cycloheptane is an aromatic compound
2. Diastase is an enzyme
3. Acetophenone is an ether
4. All the above
Which statement is not correct regarding the adsorption of a gas on the surface of a solid:
1. | On increasing temperature adsorption increase continuously |
2. | Enthalpy & entropy change is negative |
3. | Adsorption is more for some specific substance |
4. | Reversible |
Positions of the non-polar & polar parts in Micelle are:
1. | Polar at the outer surface but non-polar at the inner surface |
2. | Polar at the inner surface but non-polar at the outer surface |
3. | Distributed all over the surface |
4. | Present on the surface only |
According to the adsorption theory of catalysis, the speed of the reaction increase because:
1. | The concentration of reactant molecules at the active centers of the catalyst becomes high due to adsorption |
2. | In the process of adsorption, the activation energy of the molecules becomes large |
3. | Adsorption produces heat which increases the speed of the reaction |
4. | Adsorption lowers the activation energy of the reaction |
Which one of the following forms micelles in the aqueous solution above a certain concentration:
1. Glucose
2. Urea
3. Dodecyl trimethyl ammonium chloride
4. Pyridinium chloride