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what is hardy schulze rule ?
what is dispersed phase and dispersed medium
Give an example of protective colloid.
explain tyndall effect more deeply
Why is it generally preferable to use absorbance as a measure of absorption rather than % Transmittance?
Because %T is dependant on the power of the incident radiation
Because absorbance is proportional to the concentration of the analyte, whereas %T is not.
Because %T cannot be measured as accurately as absorbance
None of these are correct
what is magneson reagent, what is its chemical formula and name ?
what is the difference between partial hydrolysis and complete hydrolysis?
Lyophilic sols are more stable den lyophobic sols. Why???
what happens when glucose is treated with bromine water ??
what is residual force?
which of the following electrolytes is most effective for the coagulation of Fe(OH)3 sol and why?
Q3. Differentiate between peptization and coagulation.
what is Bredig's Arc method?
what is platinised asbestos???????????????
what do we mean by activity n desorption??????????????/// pls help............
difference between physisorption and chemisorption
What is bulk phase?
which of the following is most effective in coagulation of As2S3 sol?
Na3PO4, MgCl2, CaCl2, AlCl3
what is haber's process????????
What is shape selective
Distinguish between Freundlich adsorption isotherm and Langmuir adsorption isotherm also by plotting graphs?
I can't understand that when AgNO3 Is added to KI solution ,ppt. adsorbes I- ions leading to the formation of negatively charged colloidal solution ,but when KI is added to same AgNO3 solution ,then adsorption of Ag+ ion takes place ,why not I- get adsorbed in this case also?Kindly explain
Why is it generally preferable to use absorbance as a measure of absorption rather than % Transmittance?also explain.....
which get adsorbed easily on charcoal?(NH3 or CO2)
Explain what is
(i) When a beam
of light is passed through a colloidal sol.
electrolyte, NaCl is added to hydrated ferric oxide sol.
current is passed through a colloidal sol?
(1) What is meant by solvation of colloidal particle??
difference between inhibitors and promoters...
Why does physisorption increase with increase in pressure,and decrease with increase in temperature?
Explain Lee Chatelier Principle?
explain the relation between conductivity and molar conductivity of a solution?
What is the difference between catalytic poison and negative catalyst?please tell me as early as u can?
How adsorption is an exothermic reaction..???
what is electrified sand
what causes brownian movement in a colloidal solution?
Adsorption is accompanied by : also explain
decrease in enthalpy of the system
increase in entropy of the system
increase in free energy of the system
increase in both enthalpy and entropy
More easily liquefiable gases are adsorbed readily.
Please explain the reason for the above phenomenon.
The experimental isotherms always seem to approach saturation at high pressure.Why this cannot be explained by Freundlich isotherm?
If FeCl3 is added to excess of hot water, a postively charged sol of hydrated ferric oxide is formed due to adsorption of Fe3+ ions. However, when ferric chloride is added to NaOH, a negatively charged sol is obtained with adsorption of OH- ions. Why is there such a difference? Explain in detail.
Why is gelatine is added to ice-creams?
A lump of coal burns at a moderate rate in air while coal dust burns explosively.why?
what is observed when an emulsion is subjected high speed centrifugation?
what is the composition of copper matte?
Explain what is observed when a colloidal solution of arsenious sulphide is treated as follows. i) An electrolyte is added to it. ii) A beam of light is passed through it. iii) It is brought under influence of electric field. PS:I want the answer asap ...please
Why does physisorption decrease with increase in temperature?
why solid solid is called sol and gas solid is also called sol???
The range of optimum pH values for an enzyme-catalyzed reaction is
GIVE REASONS FOR THE FOLLOWING
A) colloids stabilize due to brownian movement.
B) cottrell's smoke precipitator is fitted at the mouth of chimney used in factories.
C) colloidal gold is used for intramuscular injection
explain :same substance can act both as colloids and crystalloids.(1 mark) ..... i've already seen the existing ans but not satisfied.
examples of lyophilic lyophobic sols
why hydrophobic sols are easily coagulated?
is it necessary to remove CO when ammonia is obtained by Haber’s
is negative adsorption and absorption both same thing?
Comment on the statement colloid is not a substance but only state of substance.
why weak vanderwaals forces strong near the critical temperature of the gas?
wht is preferential adsorption of colloidal sol?explain
What is the difference between double displacement and double decomposition reactions? Or are they the same?
What is an adsorption
isotherm? Describe Freundlich adsorption isotherm.
Lyophilic: The surface tension of these sols is less than that of dispersion medium.
Lyophobic: The surface tension is nearly same as that of dispersion medium.
what is flocculating ion
The charge on the sol particles is due to one or more reasons, viz., due to electron capture by sol particles during electrodispersion of metals, due to preferential adsorption of ions from solutions and/or due to formulation of electrical double layer. Please explain me the meaning of the 'bold' lines.
adsortion ,absorption,sorption is exothermic or endothermic.........n explain y is it ?
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