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Question

If the ionization enthalpy and electron gain enthalpy of an element are 275 and86 kcal mol1 respectively, then the electro -negativity of the element on the Pauling scale is:
  1. 0
  2. 2.6
  3. 4
  4. 2.8

A
2.6
B
2.8
C
0
D
4
Solution
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|XAXB|=0102×ΔE12=0102×{(27586)×418}kJ/mol=0102×281069=28628

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