A) (iv) < (ii) < (iii) < (i)
B) (ii) < (iv) < (i) < (iii)
C) (i) < (iii) < (ii) < (iv)
D) (iii) < (i) < (iv) < (ii)
Correct Answer: A
Solution :
[a] The two guiding rules to arrange the various orbitals in the increasing energy are: |
(i) Energy of an orbital increases with increase in the value of n+1 |
(ii) of orbitals having the same value of n+1, the orbital with lower value of n has lower energy. |
Thus for the given orbitals, we have |
(i) n+1=4+1=5 (ii) n+1=4+0=4 |
(iii) n+1=3+2=5 |
(iv) n+1=3+1=4 |
Hence, the order of increasing energy is (iv) < (ii) < (iii) < (i) |
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