which gas fill the cfl and light bulbs?
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I have interview in STL (Severn Trent), and I know that is a test in IQ, chemistry, Maths and english. So whoever know questions, please write.
why is the atomic radius of Mg2+ bigger than that of Na+?
what is the significance of control of absorbance in UV?
How many moles of sodium hydrogen phosphate can be prepared from 3 mol of sodium hydroxide and phosphoric acid?
what is mole fraction?
what is the difference between valency and oxidation state?
what is the oxidation number for KMnO4?
In pickling process of titatium with HCL . how to know if the acid is not effective after pickling several batch. is there any test to know it. (not practically)
process is feo,fe2o3 and fe3o4
what is Redox reaction?
For water content determination, if the material is insoluble in methnaol and ethylene glycol mono methyl ether, what other diluent can we use.
What are the products of the neutralization reaction between hydrochloric acid & magnesium hydroxide?
Organic Chemistry 
