Antacid what is antacids about antacids

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About Antacids:

 -  Antacids are the substance which on ingestion react with gastric acid and lower the acidity of gastric contents . Antacids produce a symptomic relief of heart burn , pain and also refure spasm in addition to relief from the uncomfortable feeling from overeating and a growing hungry feeling between meals.
   Antacids are weak bases and they raise the gastric pH above 4 by neutralizing excess gastric Hcl , which may be causing pain and possible ulceration . Most of the antacids are relatively free from serious side effects expect sodium bicarbonate , which in addition to raising pH above 7 , may also cause systemic alkalosis in addition to outhe effects . Antacids can also be used for inactivate proteolytic enzyme, pepsin.

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Siemens Ozoniser how Siemens Ozoniser work

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Siemens Ozoniser:  This Ozoniser consist of two co-axial glass tubes fused together at one end. The outer side of the outer glass tube and the inner side of the inner glass tube are finally coated with tin foils as shown in the figure given below.  (Siemens Ozoniser)->2                                                     (Siemens Ozoniser)->1 These tin foil are connected  to the induction coil for supply of silent electric discharge. Pure and dry oxygen gas is passed into the apparatus through annular space. The gas is then subjected to the action of silent electric discharge where oxygen gets converted into ozone. The ozonised oxygen then comes out  of the apparatus through the outlet of the Ozoniser. (Siemens Ozoniser)->2
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Rutile structure

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Rutile structure: The radius radio is in the range 0.73 to 0.41. in rutile (TiO²) each Ti⁴+ ion is octahedrally surrounded by six O²- ions whereas each other O²- ion is surrounded by only three Ti⁴+ ions arranged at the tree corners of a plane triangle. The Co-ordination number of Ti⁴+ and O²+ ions are 6 and 3, respectively. It is not exactly a close packed structure. Ti⁴+ ions in rutile may however, be considered as forming a sufficiently distorted body centred cubic lattice.           Example  compounds  having radius ratio below 0.41 are SiO² and BeF² but these are only a few. The Co-ordination number of Si⁴+ and Be²+ is four and that of O²- is two. However, these are appreciably co-valent.
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F - block element What are f - block elements

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