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Q. Isolation and purification of metals?
metals as a group of elements have acquired a unique importance in the modern world. However, nature' does not generally offer us metals in the Free State. Metals usually occur in nature in combined state as ores mixed with other earthy materials. The branch of science dealing with the methods of extraction of metals from their ores is called metallurgy.
The Fermi level is The highest occupied energy level at 0 0 K.
The quantum number which may be designated by s, p, d, and f instead of number is: (1) n (2) l (3) m 1
The atom of the element having atomic number 14 should have: (1) One unpaired electron (2) Two unpaired electrons (3) Three unpaired electrons (4) Four unpaired electr
Maximum number of electrons present in N shell is: (1) 18 (2) 32 (3) 2 (4) 8 Ans: 32
Drying of Organic Substances- purification of organic compounds Several solids are dried first by pressing them gently in between folds of filter papers. Compounds that neither
Why secondary and tertiary amine doesn''t give carbylamine reaction
give a brief explaination of magnetic separation is. ?
Q. Determine the equilibrium constant? At 298 K, the molar conductivities at infinite dilution of NH 4 Cl, NaOH and NaCl are 129.8,217.4 and 108.9 ohm -1 cm 2 mol -1 respect
apparatus and principle of Flah photolysis...and 3rd order reaction with two same and one different concentration.
What are distinguishing characteristics of metallic bonding? Metallic state can be visualized like an array of positive ions, with a common pool of electrons to
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