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what is hardy schulze rule ?
what is dispersed phase and dispersed medium
which of the following is most effective in coagulation of As2S3 sol?
Na3PO4, MgCl2, CaCl2, AlCl3
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???
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.
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?
Q3. Differentiate between peptization and coagulation.
what is Bredig's Arc method?
why physisorption results into multi-molecular layer and chemisorption results into uni molecular layer???????????
difference between physisorption and chemisorption
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
What is the difference
between multimolecular and macromolecular colloids? Give one example
of each. How are associated colloids different from these two types
which get adsorbed easily on charcoal?(NH3 or CO2)
Explain the formation of delta.
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...
On addition of 1 ml solution of 10% NaCl to 10 ml of gold sol in the presence of 0.025g of starch the coagulation is just prevented. The gold number of starch is (A) 0.025 (B) 0.25 (C) 2.5 (D) 25
explain the relation between conductivity and molar conductivity of a solution?
How adsorption is an exothermic reaction..???
Why is gelatine is added to ice-creams?
what causes brownian movement in a colloidal solution?
More easily liquefiable gases are adsorbed readily.
Please explain the reason for the above phenomenon.
what will happen if a beam of light is passed through nacl and then through a sol?
why weak vanderwaals forces strong near the critical temperature of the gas?
what is observed when an emulsion is subjected high speed centrifugation?
what is the composition of copper matte?
Ultramicroscope does not provide any information about the size and shape of colloidal particles.Why?
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
what is emultion.
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
the vapour pressure of pure benzene at 25*c is 639.7 mm of Hg and vapour pressure of solute in benzene at the same temprature is 631.9 mm of Hg. calculate the molality
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?
is negative adsorption and absorption both same thing?
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 role does
adsorption play in heterogeneous catalysis?
What is an adsorption
isotherm? Describe Freundlich adsorption isotherm.
what is platinised asbestos???????????????
what do we mean by activity n desorption??????????????/// pls help............
what is flocculating ion
what happens when an electrolyte is added to ferric hydroxide sol
adsortion ,absorption,sorption is exothermic or endothermic.........n explain y is it ?
when H2S is passed through nitric acid what is the product?
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