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Consider the following conversion 1)O(g) + e-_____>O- ;∆H1 2)F(g) + e-______> F-(g) ;∆H2 3)Cl(g) + e- _______> Cl-(g) ;∆H3 4)Na(g)________> Na+(g) ;∆H4 Incorrect statement is:- (1)∆H1 and ∆H2 is less negative then ∆H3 2) ∆H2 is more negative then∆H1 3)∆H2 and ∆H3 is negative while ∆H1 is positive 4)∆H1 ,∆H2and ∆H3 are negative while∆H1 is positive.
Asked by jhajuhi19 | 22 Feb, 2019, 08:02: AM
answered-by-expert Expert Answer
  • Energy is released when an electron is added to the atom. Therefore, the electron gain enthalpy is negative.
  • The electron gain enthalpy becomes less negative as we move down a group.
  • Chlorine has the most negative electron gain enthalpy.
  • Electron gain enthalpy becomes more and more negative from left to right in a period.

Thus Going through these facts we find option 1 as incorrect one.

Since ΔH1 =  ΔH2 =  ΔH3 = -Ve and  ΔH4 = +Ve

Answered by Sumit Chakrapani | 22 Feb, 2019, 04:10: PM

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