• In this method, the substance is first ground to coarse particles. Copyright © 2010-2019 www.emedicalprep.com. The increased bending of violet light over red by a glass prism is therefore the result of normal dispersion. • The process of converting a freshly prepared precipitate into colloidal form by the addition of suitable electrolyte is called, • The electrolyte is used for this purpose is called, • Freshly prepared ferric hydroxide can be converted into colloidal state by shaking it with water containing, Complete List of Packages for Medical Preparation. Learn a new word every day. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Dispersion Methods. The degree of refraction depends on the refractive index. You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary. Lyophilic … The following methods are employed. Our purpose was to … Get kids back-to-school ready with Expedition: Learn. Please tell us where you read or heard it (including the quote, if possible). • The metal whose sol is to be prepared is made as two electrodes which immerged in dispersion medium such as water etc.
• It consists of two metallic discs nearly touching each other and rotating in opposite directions at a very high speed about 7000 revolution per minute.
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• The colloidal solution prepared is stabilised by adding a small amount of. • Colloidal solutions of black ink, paints, varnishes, dyes etc. • Freshly prepared ferric hydroxide can be converted into colloidal state by shaking it with water containing or ions, viz. This process is facilitated by molecular diffusion and convection. are obtained by this method. (a) Mechanical dispersion • In this method, the substance is first ground to coarse particles. • This method is used to prepare sols of platinum, silver. • The process of converting a freshly prepared precipitate into colloidal form by the addition of suitable electrolyte is called peptisation. substance fr solid dispersion dispersion composition liters Prior art date 1986-04-02 Legal status (The legal status is an assumption and is not a legal conclusion. Normal dispersion depends on refractive index and wavelength of light. Test Your Knowledge - and learn some interesting things along the way. Shape-selective catalysis. Beyond simply describing a change in the phase velocity over wavelength, a more serious consequence of dispersion in many applications is termed group velocity dispersion. While phase velocity v is defined as v = c/n, this describes only one frequency component. • The tremendous heat generate by this method and give colloidal solution. Can you spell these 10 commonly misspelled words? This pulse might be a communications signal, for instance, and its information only travels at the group velocity rate even though it consists of wavefronts advancing at a faster rate (the phase velocity).
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