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Which of the following has the least energy:
(1) 2p
(2) 3p
(3) 2s
(4) 4d
Ans: 2s
Q. Show the Liquation in purification of metals? Crude tin, bismuth and lead are purified by liquation. In this process, the impure metal is placed at the top of a sloping hear
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Metals: Iron : 1. Most automobiles, machine tools, building parts, the hulls of large ships, and machine parts are made out of iron. (Iron metal is strong but is quite
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during the process of extraction of pure copper from copper pyrite,SiO2 acts as acidic flux which combines with iron oxide(FeO) to form iron silicate(FeSiO3). CuFeS2 + heat ---> Cu
The electronic configuration of calcium ion ( Ca2 + ) is: (1) 1s 1 , 2s 2, 2p 6 , 3s 2 , 3p 6 , 4s 2 (2) 1s 1 , 2s 2 , sp 6 , 3s 2 , 3p 6 , 4s 1
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