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what is hardy schulze rule ?
what is dispersed phase and dispersed medium
which of the following electrolytes is most effective for the coagulation of Fe(OH)3 sol and why?
explain tyndall effect more deeply
what is magneson reagent, what is its chemical formula and name ?
1 gm of charcoal adsorbs 100 ml 0.5 M CH3COOH to form a monolayer thereby the molarity of CH3COOH reduces to 0.49. Calculate the surface area of the charcoal adsorbed by each molecule of acetic acid. Surface area of charcoal= 3.01x 102 m2/gm.
Lyophilic sols are more stable den lyophobic sols. Why???
what happens when glucose is treated with bromine water ??
what is the difference between partial hydrolysis and complete hydrolysis?
Q3. Differentiate between peptization and coagulation.
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
what is Bredig's Arc method?
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
difference between physisorption and chemisorption
what is platinised asbestos???????????????
what do we mean by activity n desorption??????????????/// pls help............
which of the following is most effective in coagulation of As2S3 sol?
Na3PO4, MgCl2, CaCl2, AlCl3
what is haber's process????????
Explain the formation of delta.
What is shape selective
why hydrophobic sols are easily coagulated?
Distinguish between Freundlich adsorption isotherm and Langmuir adsorption isotherm also by plotting graphs?
what is residual force?
which get adsorbed easily on charcoal?(NH3 or CO2)
what happens when a colloidal sol of ferric hydroxide and arsenic sulfide are mixed
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?
why are the reactions of high molecularity are rare
Why is gelatine is added to ice-creams?
explain the relation between conductivity and molar conductivity of a solution?
difference between inhibitors and promoters...
Give an example of protective colloid.
How adsorption is an exothermic reaction..???
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 causes brownian movement in a colloidal solution?
More easily liquefiable gases are adsorbed readily.
Please explain the reason for the above phenomenon.
what is observed when an emulsion is subjected high speed centrifugation?
what is the composition of copper matte?
explain :same substance can act both as colloids and crystalloids.(1 mark) ..... i've already seen the existing ans but not satisfied.
Why does physisorption decrease with increase in temperature?
is it essential to wash the precipitate with water before estimating
examples of lyophilic lyophobic sols
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
Comment on the statement colloid is not a substance but only state of substance.
is it necessary to remove CO when ammonia is obtained by Haber’s
What is the difference between double displacement and double decomposition reactions? Or are they the same?
which enzyme convert starch into maltose?
wht is preferential adsorption of colloidal sol?explain
What is an adsorption
isotherm? Describe Freundlich adsorption isotherm.
adsortion ,absorption,sorption is exothermic or endothermic.........n explain y is it ?
what is flocculating ion
What is enzyme?
why does bleeding stop when alum is applied on a fresh wound?
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