Explanation
Action of sodium aluminium silicate is a simple chemical subsititution of calcium salts with zeolite so that calcium zeolite precipitates out and hardness of water removes.
In hydrogenation of oils, Ni is used as a catalyst.
None of these statements is true.
A catalyst decreases the activation energy of forward and backward reactions
A catalyst changes rate constant in a reaction
Lyophobic sol scatters a beam of light and passes completely through the filter paper
Platinum black adsorbs H2 gas most strongly.
Negatively charged As2S3 sol is coagulated most effectively by MgCl2.
Osmosis is responsible for this phenomenon.
Dispersion of ppt. into colloidal sol is called peptisation
As2S3 is negative sol
Sulphur sol contains large aggregates of S8 molecules
Cow milk is an emulsion stabillised by casein
Colour of gold sol prepared by different methods is different because of different particle sizes
A catalyst cannot initiate a reaction
Crystalloids and colloids differ in particle size.
As particles move towards anode, these are ─ vely charged and are coagulated by AlCl3 > BaCl2 > NaCl
Breaking and dispersion into colloidal state is a process called peptisation.
(a) is a true statement
Colloidal sol shows Brownian movement
Random motion of colloidal particles is called Brownian movement.
d) is true.
Formaldehyde is an emulsifier
Refer to definition of Congo-Rubin number
Cod liver oil is water dispersed in oil
Adsorption theory is applicable to heterogeneous catalysis
At CMC (Critical Micellization concentration), the surfactant molecules associate to form micelles.
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