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Which of the following has highest melting point:
(1) BaCl2
(2) MgCl2
(3) Cacl2
(4) BaCl2
Ans: BaCl2
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why exception is seen in lanthanoids
An element have atomic weight 40 and it's electronic configuration is 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 6 . Then its atomic number and number of neutrons will be: (1) 18 and 22
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Consider a SAWmodel for the same polymer, but with the ?rst monomer bonded to the wall. (This is the model we treated in class.) How many con?gurations have now been eliminated as
what is definaion of leveling effect
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