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what is hardy schulze rule ?
why physisorption results into multi-molecular layer and chemisorption results into uni molecular layer???????????
what is dispersed phase and dispersed medium
explain tyndall effect more deeply
what is magneson reagent, what is its chemical formula and name ?
Lyophilic sols are more stable den lyophobic sols. Why???
which of the following is most effective electrolyte in the coagulation of AgI/ Ag+sol?
K2SO4 , MgCl , K4[Fe(CN)6] .
what happens when glucose is treated with bromine water ??
which of the following electrolytes is most effective for the coagulation of Fe(OH)3 sol and why?
Coagulation takes place when sodium chloride solution is added to a colloidal solution of ferric
Q3. Differentiate between peptization and coagulation.
what is Bredig's Arc method?
difference between physisorption and chemisorption
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.
which of the following is most effective in coagulation of As2S3 sol?
Na3PO4, MgCl2, CaCl2, AlCl3
what happens when the electrodes are connected to the battery are dipped into the sol?
what is haber's process????????
what is residual force?
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
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?
difference between inhibitors and promoters...
explain the relation between conductivity and molar conductivity of a solution?
How adsorption is an exothermic reaction..???
what causes brownian movement in a colloidal solution?
in chemisorption , why x/m increases and then decreases with rise in temperature ?
More easily liquefiable gases are adsorbed readily.
Please explain the reason for the above phenomenon.
why weak vanderwaals forces strong near the critical temperature of the gas?
Why is gelatine is added to ice-creams?
What is collodion???
what is observed when an emulsion is subjected high speed centrifugation?
what is the composition of copper matte?
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?
Explain the formation of delta.
what is platinised asbestos???????????????
what do we mean by activity n desorption??????????????/// pls help............
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.
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
what is the difference between partial hydrolysis and complete hydrolysis?
What is bulk phase?
wht is preferential adsorption of colloidal sol?explain
What is the difference between double displacement and double decomposition reactions? Or are they the same?
Q--Assertion (A) : Electron gain enthalpy becomes less negative as we go downa group.Reason (R) : Size of the atom increases on going down the group and theadded electron would be farther from the nucleus.
also explain the answer.........
What is an adsorption
isotherm? Describe Freundlich adsorption isotherm.
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.
what is flocculating ion
difference between activators, inhibitors, promoters and co-enzymes.
adsortion ,absorption,sorption is exothermic or endothermic.........n explain y is it ?
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