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Short note on synthetic rubber. S ol. Synthetic rubber: main types of synthetic rubbers: 1. Styrene rubber: Buna-S; Bu-Butadiene; Na=sodium; = Styrene
what is diagonal relationship?
In the following which substance will have highest boiling point: (1) He (2) CsF (3) NH 3 (4) CHCl 3 Ans: CsF
test for acidic radicals
Q. Show the Uses of Emulsions? Emulsions provide many useful functions in food preparation and processing. They: 1) act as vehicles for flavour to foods, 2) dilute ingr
Physical Properties of Cinnamic Acid (a) Cinnamic Acid is a white crystalline solid and its melting point 133° C . (b) Cinnamic Acid is sparingly soluble in water. (c) Ci
Why li 2 CO 3 decomposed at a lower temperature whereas Na2CO3 at higher temp?
Physical methods for Non-volatile substances The non-volatile organic compound's molecular mass can be ascertained by noting either the elevation in boiling point of the solve
Dear sir, We need your consultancy in a technical problem that we are confronting, and we would really appreciate your help We are in the process of implementing the heavy metal an
Explain in detail about the Allotropy Allotropy refers only to dissimilar forms of an element within the similar phase or state of matter (i.e. different solid, liquid or gas
Colloids are classified as two types which are the lyophilic / reversible and lyophobic / irreversible. If water is the dispersion medium, then the term used are hydrophilic and hydrophobic.Lyophilic colloids: A colloidal system which may be constructed readily by simple warming or shaking the substance in a suitable solvent is called as lyophilic colloid. Substances that form lyophilic colloids involves gelatin, starch, and rubber, proteins, gum. Lyophilic colloids are also named as reversible colloids as on evaporating the dispersion medium such as water, the substance or the residue may be again reconverted into colloidal state simply by addition of the liquid i.e. water. These solutions are reasonably stable and usually cannot be easily precipitated.Lyophobic colloids: colloids constructed with difficulty are termed as lyophobic colloids. These colloids are constructed by substances such as As2S3 , Fe(OH)3, gold and other metals that are sparingly soluble and thus their molecules do not pass readily into colloidal state. Lyophobic colloids are called as irreversible colloids since the residue cannot readily be reconverted into sol by ordinary means. These solutions are quite readily precipitated and hence they are not stable.
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