Classification Of Elements And Periodicity In Properties Question 314
Question: The correct order of electron affinity of B, C, N, O is [MP PET 1997; J & K 2005]
Options:
A) $ O>C>N>B $
B) $ B>N>C>O $
C) $ O>C>B>N $
D) $ O>B>C>N $
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Answer:
Correct Answer: C
Solution:
$ \underset{140.9}{\mathop{O}},>\underset{122.3}{\mathop{C}},>\underset{83}{\mathop{B}},>\underset{0}{\mathop{N}}, $ Value of electron affinity increases on going from left to right in periods but the value of electron affinity of Vth A elements is less than that of IVth A element, this is due to half filled p-orbitals presence.
BETA
