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what is hardy schulze rule ?
The experimental isotherms always seem to approach saturation at high pressure.Why this cannot be explained by Freundlich isotherm?
what is dispersed phase and dispersed medium
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
explain tyndall effect more deeply
what is magneson reagent, what is its chemical formula and name ?
how many chiral carbon atoms are there in1-chloro-2,5-dimethyl chlorohexane?
Lyophilic sols are more stable den lyophobic sols. Why???
what is residual force?
what happens when glucose is treated with bromine water ??
Chemisorption is more exothermic than physisorption..and so with the increase in temperature chemisorption should decrease..as it happens in the case of physisorption But it increases Why ?
which of the following electrolytes is most effective for the coagulation of Fe(OH)3 sol and why?
A lump of coal burns at a moderate rate in air while coal dust burns explosively.why?
Q3. Differentiate between peptization and coagulation.
what is a stearate ion??
what is Bredig's Arc method?
difference between physisorption and chemisorption
which of the following is most effective in coagulation of As2S3 sol?
Na3PO4, MgCl2, CaCl2, AlCl3
Give an example of protective colloid.
what is haber's process????????
What is shape selective
Distinguish between Freundlich adsorption isotherm and Langmuir adsorption isotherm also by plotting graphs?
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.
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
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?
plz explain, Physisorption is reversible whereas Chemisorption is irreversible in nature.
difference between inhibitors and promoters...
(1) What is meant by solvation of colloidal particle??
explain the relation between conductivity and molar conductivity of a solution?
How adsorption is an exothermic reaction..???
what aspect of a reaction is influenced by presence of a catalysts which increases the rate of possibility of reaction
what causes brownian movement in a colloidal solution?
More easily liquefiable gases are adsorbed readily.
Please explain the reason for the above phenomenon.
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?
why weak vanderwaals forces strong near the critical temperature of the gas?
what is observed when an emulsion is subjected high speed centrifugation?
why physisorption results into multi-molecular layer and chemisorption results into uni molecular layer???????????
what is the composition of copper matte?
negatively charged sheaths around the globule prevents them from coming together and forming aggregates. what does this statement means????
( NCERT lines page:137)
Why does physisorption decrease with increase in temperature?
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
Comment on the statement colloid is not a substance but only state of substance.
what is the difference between partial hydrolysis and complete hydrolysis?
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 platinised asbestos???????????????
what do we mean by activity n desorption??????????????/// pls help............
why gas masks are used by miners in coal mines while working?
What is an adsorption
isotherm? Describe Freundlich adsorption isotherm.
Why is it generally preferable to use absorbance as a measure of absorption rather than % Transmittance?also explain.....
what is flocculating ion
adsortion ,absorption,sorption is exothermic or endothermic.........n explain y is it ?
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