occurrence and uses

Occurrence and Uses - Silicon is present in nature in the form of silica (SiO 2 ) and silicates. Rocks and clays consist of silicate minerals. Silicon is the second most abundant element (~ 27.2 wt%) on the earth's crust after oxygen {45.5wt%}. Germanium is a trace element (1.5 ..

Silicon is present in nature in the form of silica (SiO 2 ) and silicates. Rocks and clays consist of silicate minerals. Silicon is the second most abundant element (~ 27.2 wt%) on the earth's crust after oxygen {45.5wt%}. Germanium is a trace element (1.5 ppm) and is mainly recovered from flue dus..

. Aluminium is a lightweight metal with a density of 2.7 g cm - 3 . Al can be easily extruded through dies to form various shapes. It is used for making angles used in windows. Aluminium cables are used to transmit electric current. Al alloys are used in airc..

Occurrence and Uses of Phosphorus - Phosphorus is widely distributed in nature. It does not occur in free state since it can be very easily oxidised. It is usually present in rocks in the combined state as phosphates. The main phosphate rocks are: Phosphorite: Ca 3 (PO 4 ) 2 Flu..

Phosphorus is widely distributed in nature. It does not occur in free state since it can be very easily oxidised. It is usually present in rocks in the combined state as phosphates. The main phosphate rocks are: Phosphorite: Ca 3 (PO 4 ) 2 Fluorapatite: 3Ca 3 (PO 4 ) 2 . CaF 2 Chlorapatite: 3Ca 3 (..

Iron is quite reactive, so it is not found in free state in nature. In the combined state, iron is found in the form of oxide, carbonate and sulphide. Iron occurs in the form of its sulphide in iron pyrites. It is not used commercially for the extraction because of its high sulphur conten..

Every one of us carries a hydrochloric acid manufacturing unit in our body! It is present in the gastric juice of all mammals. In the stomach hydrochloric acid helps to produce pepsin, which is used for the digestion of proteins. It also helps to destroy harmful microorganisms that enter ..

Suppose the two events are not independent, that is the occurrence of one depends on the occurrence of other, then how do we compute This can be explained by conditional probability. Baye's theorem is named after the British mathematician Thomas Bayes who published..

Petroleum is brought to the surface by drilling a hole in the Earth's crust and sinking pipes deep down through the impervious cap rock. Natural gas first comes out under high pressure. Then, petroleum is pumped out, collected in tanks and transported, for further processing. Occurrence..

Introduction - From our earlier chapter we know that, in statistical experiments, if the events A and B are independent, then But suppose the two events are not independent, that is the occurrence of one depends on the occurrence of other, then how do we compute This can be expl..