In which of the sols, the colloidal particles are with a negative charge?
1. TiO2
2. Hemoglobin
3. Starch
4. Hydrated Al2O3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following forms micelles in aqueous solution above certain concentration -
1. Glucose
2. Urea
3. Dodecyl trimethyl ammonium chloride
4. Pyridinium chloride
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAt the critical micelle concentration (CMC) the surfactant molecules :
1. Associate
2. Dissociate
3. Decompose
4. Become completely soluble
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAccording to hardy Schulze law the order of coagulation power of cations will be:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following method is commonly used method for destruction of colloid :
1. Dialysis
2. Condensation
3. Filteration by animal membrane
4. By adding electrolyte
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPosition of the nonpolar & polar part in Micelle is:
1. | Polar at the outer surface but non-polar at the inner surface |
2. | Polar at inner surface but non-polar at the outer surface |
3. | Distributed all over the surface |
4. | Present on the surface only |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following is correct : -
1. Cyclo heptane is an aromatic compound
2. Diastase is an enzyme
3. Acetophenone is an ether
4. All the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich is not correct regarding the adsorption of a gas on the surface of solid: -
1. | On increasing temperature adsorption increase continuously |
2. | Enthalpy & entropy change is negative |
3. | Adsorption is more for some specific substance |
4. | Reversible |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAccording 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe right option for the statement "Tyndall effect is exhibited by", is:
1. Starch solution
2. Urea solution
3. NaCl solution
4. Glucose solution
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology