JEE Main 2016 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties JEE Main 2016

The following statements concern elements in the periodic table. Which of the following is true?

(1)For group 15 elements, the stability of oxidation state increases down the group.
(2)Elements of group 16 have lower ionization enthalpy values compared to those of group 15 in the corresponding periods.Correct
(3)The group 13 elements are all metals.
(4)All the elements in group 17 are gases.

Answer: (2)

Solution

Statement (2) is true, and the reason is the half-filled subshell. A group 15 atom has the configuration , in which the three electrons occupy separate orbitals with parallel spins — an unusually stable arrangement that is hard to disturb. A group 16 atom has , where the fourth electron

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Question ID VK-115615