4.
The bond order in NO is 2.5 while that in NO+ is 3. Which of
the following statements is true for these two species
(a) Bond length in NO+ is equal to that in NO
(b) Bond length in NO is greater than in NO+
(c) Bond length in NO+ is greater than in NO
(d) Bond length is unpredictable
Higher the bond order, shorter will be the bond length,
thus NO+ having the higher bond order that is 3 as
compared to NO having bond order 2 so NO+ has
shorter bond length.