What is ozonised mineral water?

Ozone is a blue gas with a relative molar mass of 48 and molecular formula of O3.It converts into oxygen after oxidizing process is complete.Ozone is the ultimate Eco-friendly disinfectant. Like when drinking water is treated with Chlorine (which is found to be highly carcinogenic chemical) ,the residual chlorine is consumed with the water.On the other hand residual ozone,having a half life of only 20 minutes reduces to oxygen, leaving behind pure and safe drinking water.
Another added advantage of using ozone is that it destroys all the micro organisms leaving behind colourless and odourless water.
Ozone generators produce ozone by passing oxygen through electric field.This ozone is bubbled through the water to be treated in a specially designed apparatus with controlled rate of injection.The amount of ozone diffused in water is directly proportional to the contamination of water.  

Like ordinary paints do metallic paints also fade?

Metallic paints do fade. It depends on the quality and the type of the aluminium paste used. Usually in most of the metallic paints, the commonly used pigment is aluminium pigment in the form of paste. Two types of aluminium pigments are available in the market. One is leafing, and the other is the non-leafing aluminium pigment will not get dispersed (or dispersed partially) with the resin while mixing, whereas the non-leafing will get completely dispersed with the resin during mixing.
            So, if the metallic paint contains the leafing aluminium pigment it will get faded over a period of time, whereas if it contains a non-leafing aluminium pigment it will not fade for a longer period.Example: The street lampposts on the roads and highways which are coated with metallic paints appear dull after a short period of coating, whereas cars coated with metallic paints shine even after a long time.

What is RDX?

RDX, widely used as an explosive and as a base charge for detonators,is the British abbreviation for Research Department Explosive or Royal Demolition Explosive . Chemists call it by various names such as cyclo-tri-methylene tri-nitramine, 2,4,6 tri-nitro N-methyl aniline, tetryl, hexa-hydro-1,2,3-trinitro-5-triazine, hexagon, T4 and cyclonite.
             RDX is odourless and so it can not be detected by conventional devices.Unlike other explosive, it carries fuel and oxidiser in the same molecule.On detonation it creates a powerful blast that sends out shock waves.It is used as energy boosting explosive in double base solid propellant where smokelessness is an advantage.
             RDX is prepared by reacting hexamethylene tetramine or its dinitrate salt with nitric acid.The famous Bachman process uses hexamine, nitric acid,ammonium nitrate and acetic anhydride.RDX can be easily moulded into any shape,for example, like a long thread or a sheet, and that is why it comes in handy for terrorists.

How does carbon change into diamond?

Carbon changes into diamond and graphite in the depths of the earth under high pressure and temperature.The process might have taken millions of years.A French scientist,Moissan,verified this theory by experiment.He heated carbon(as charcoal) and iron together in an electric furnace at 3,500 degrees celcius.Carbon dissolved in the molten iron and the mass was cooled suddenly by dipping in water.Then it was put in acid.The iron dissolved and the residue was found to contain a few very small diamonds (less than one millimetre in size) and some graphite .These results were confirmed by others too.Today diamonds are mass-produced by this method.


Artificial diamonds have the same structure,density and hardness as natural diamonds,but are very small.They are also opaque to x rays.Hence they are used mostly for making hard-edged cutting tools and dies and for cutting and polishing natural diamonds,and not for making ornaments.