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Q)why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction? Ans) The Standard free energy of formation of Cu2S is greater than
p-orbitals of an atom in presence of magnetic field are: (1) Two fold degenerate (2) Non degenerate (3) Three fold degenerate (4) None of these Ans: Non degenerate
ionic bonds are usually formed by combination of elements with
an elementary ideas of cft
Which type of compounds show high melting and boiling points: (1) Electrovalent compounds (2) Covalent compounds (3) Coordinate compounds (4) All the three types of co
Number of protons, neutrons and electrons in the element 231/89 y is: (1) 89, 231, 89 (2) 89, 89, 242 (3) 89, 142, 89 (4) 89, 71, 89 Ans: 89, 142, 89
question about decantation
bilogical importance of carbon coumpounds
theory of oxidation & reduction titration with examples
Difference between Oils and Fats Oils and fats belong to similar chemical group, although they are different in their physical state. (i) Oils are liquids at normal temperat
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