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GEOCHEMISTRY
The chemical processes taking place in the crust are especially important as they have build ores, concentrated mineral deposits that are exploited industrially as sources of specific components and their elements. Summarizes the principal chemical forms in which each element perform. At least half the elements prepare in the crust as oxides (mostly complex ones such as silicates) or less commonly as halides, and are called lithophiles. All the bigger electropositive metals are in this class. Chalcophiles are components present in sulfide minerals; these include some elements chemically same to sulfur (As, Se) together with less electropositive metals of the later post transition and transition metal groups.
Fig. 1. The periodic table showing the principal types of chemical compound occurring for elements at the Earth's surface.
lanthanoids with +4 o.s act as strong oxidising agents even though it is in stable configuration f zero
The magnetic quantum number specifies : (1) Size of orbitals (2) Shape of orbitals (3) Orientation of orbitals (4) Nuclear stability Ans: Orientation of orbitals
explain the mechanism
Q. At 298.15K, the partial molar volume of CO 2 (aq) is 33cm 3 mol -1 . Estimate the percent change in the value of the Henry's law constant kH,B for aqueous CO 2 at 298.15K when
The first use of quantum theory to explain the structure of atom was made by: (1) Heisenberg (2 )Bohr (3) Planck (4) Einstein Ans: Bohr
explain the construction of calomel electrode.explain how this electrode is used to determine the potential of an unknown electrode
analysis of group III basic radicals Ti 4+, Th4+, Zr4+, V5+, Ce4+ and UO2 2+
group 14 reaction with oxygen
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what is the gram atomic mass of hydrogen and oxygen?
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