The order of electron gain enthalpy in kJ/mol of fluorine, chlorine, bromine and iodine, respectively are
The order of electron gain enthalpy in kJ/mol of fluorine, chlorine, bromine and iodine, respectively are
Option 1 -
-333, -325, -349 and -296
Option 2 -
-333, -349, -325 and -296
Option 3 -
-349, -333, -325 and -296
Option 4 -
-296, -325, -333 and -349
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1 Answer
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Correct Option - 2
Detailed Solution:Electron gain enthalpy increases with electro negativity chlorine has higher electron gain enthalpy than fluorine (exception)
Similar Questions for you
Among isoelectronic monoatomic species, size is inversely proportional to atomic number. Hence among isoelectronic species Na? , O²? , N³? , F? (having the nearest noble gas configuration);
Order of size is Na? < F? < O²? < N³?
N³? has least atomic number hence the largest size
In isoelectronic species nuclear charge can be approximated as
Nuclear charge ≈ z / no. of electrons
Al³? Mg²? Na? F? O²? N³?
Nuclear Charge: 13/10 12/10 11/10 9/10 8/10 7/10
Minimum nuclear charge is in N³? and maximum is in Al³?
So order should be
Al³? < Mg²? < Na? < F? < O²? < N³?
(a) The element V has the highest first ionization enthalpy (? iH1) and positive electron gain enthalpy (? egH) and hence it is the least reactive element. Since inert gases have positive? egH, therefore, the element-V must be an inert gas. The values of? iH1, ? iH2 and? egH match that of He.
(b) The element II which has the least first ionization enthalpy (? iH1) and a low negative electron gain enthalpy (? egH) is the most reactive metal. The values of ? iH1, ? iH2 and? egH match that of K (potassium).
(c) The element III which has high fi
This is a Matching Type Questions as classified in NCERT Exemplar
i d + 48
ii a &n
This is a Matching Type Questions as classified in NCERT Exemplar
i ) b 1681 3374 – 328
ii ) a 419 3051 – 48
iii)
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