NEET 2008 Chemistry question

Which one of the following arrangements does not give the correct picture of the trends indicated against it?

(1) : Electronegativity
(2) : Oxidizing power
(3) : Electron gain enthalpy
(4) : Bond dissociation energyCorrect

Answer: (4)

Solution

Electronegativity decreases down the halogen group (F 4.0 > Cl 3.0 > Br 2.8 > I 2.5), so (1) is correct. Oxidising power also decreases from to (standard reduction potentials 2.87, 1.36, 1.09, 0.54 V), so (2) is correct. Electron gain enthalpy is taken to follow the same general decrease,

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Question ID VK-090012