JEE Main Chemistry question

Which of the following characteristics regarding halogens is not correct?

(A)Ionization energy decreases with increase in atomic number
(B)Electronegativity decreases with increase in atomic number
(C)Electron affinity decreases with increase in atomic numberCorrect
(D)Enthalpy of fusion increases with increase in atomic number

Answer: (C)

Solution

Ionisation energy and electronegativity both correctly decrease down the halogen group as atomic number increases (A and B are correct), and enthalpy of fusion correctly increases down the group as atomic size and polarisability increase (D is correct). Electron affinity, however, does not decrease

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Question ID VK-133536