JEE MAIN - Chemistry (2016 - 10th April Morning Slot - No. 13)
The following statements concern elements in the periodic table. Which of the following is true ?
All the elements in Group 17 are gases.
The Group 13 elements are all metals.
Elements of Group 16 have lower ionization enthalpy values compared
to those of Group 15 in the corresponding periods.
For Group 15 elements, the stability of + 5 oxidation state increases down
the group.
Explanation
(A) Group 17 elements are halogens; they exist in all three states of matter at room temperature.
(B) Except for the lightest element (boron), all other Group 13 elements are relatively electropositive and are thus metals.
(C) Group 15 elements have half-filled electronic configuration, thus have high values of ionization enthalpy, while Group 16 elements achieve halffilled configuration on loss of one electron and therefore have lower ionisation enthalpy.
(i) In Group 15 elements, due to the inert pair affect the stability of +5 oxidation state decreases down the group.Comments (0)
