The colour of the X 2 molecules of group 17 elements changes gradually from yellow to…
Chemistry · JEE Advanced · NTA Exams — p-Block Elements
The colour of the X2 molecules of group 17 elements changes gradually from yellow to violet down the group. This is due to (2017)
- decrease in π* – σ* gap down the group
- decrease in ionisation energy down the group
- the physical state of X2 at room temperature changes from gas to solid down the group
- decreases in HOMO-LUMO gap down the group
Answer
(A) decrease in π * – σ * gap down the group, (D) decreases in HOMO-LUMO gap down the group
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