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Which of the following has highest melting point:
(1) BaCl2
(2) MgCl2
(3) Cacl2
(4) BaCl2
Ans: BaCl2
The energy required to dislodge electron from excited isolated H-atom, IE 1 = 13.6 eV is: (1) = 13.6eV (2) > 13.6eV (3) 3.4 eV
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