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what is hardy schulze rule ?
Give an example of protective colloid.
what is dispersed phase and dispersed medium
explain tyndall effect more deeply
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 magneson reagent, what is its chemical formula and name ?
what is residual force?
Lyophilic sols are more stable den lyophobic sols. Why???
generally high temperature is favourable for chemisorption. why?
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 happens when glucose is treated with bromine water ??
why is silica gel is used as dehumidizer?
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 bulk phase?
difference between physisorption and chemisorption
which of the following is most effective in coagulation of As2S3 sol?
Na3PO4, MgCl2, CaCl2, AlCl3
what is the difference between partial hydrolysis and complete hydrolysis?
what is haber's process????????
What is shape selective
wht is preferential adsorption of colloidal sol?explain
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
what is platinised asbestos???????????????
what do we mean by activity n desorption??????????????/// pls help............
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?
More easily liquefiable gases are adsorbed readily.
Please explain the reason for the above phenomenon.
which of the following is most effective electrolyte in the coagulation of AgI/ Ag+sol?
K2SO4 , MgCl , K4[Fe(CN)6] .
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?
Choose the correct option about absorbility of compound :
what is observed when an emulsion is subjected high speed centrifugation?
what is the composition of copper matte?
why weak vanderwaals forces strong near the critical temperature of the gas?
Why does physisorption decrease with increase in temperature?
A lump of coal burns at a moderate rate in air while coal dust burns explosively.why?
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
is negative adsorption and absorption both same thing?
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?
(a) when animal charcoal is added to a solution of methylene blue dye?
(b) when aq. solution of raw sugar is passed over beds of animal charcoal?
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.
wht is preferential adsorption?
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.
what is flocculating ion
adsortion ,absorption,sorption is exothermic or endothermic.........n explain y is it ?
why does bleeding stop when alum is applied on a fresh wound?
in chemisorption , why x/m increases and then decreases with rise in temperature ?
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