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Solution


Q.

4d,5p,5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is        [2019]
 
1 5f>6p>4d>5p  
2 5f>6p>5p>4d  
3 6p>5f>5p>4d  
4 6p>5f>4d>5p  

Ans.

(2)

Higher the value of (n+l) for an orbital, higher is its energy. However, if two different types of orbitals have same value of (n+l), the orbital with lower value of n has lower energy. Therefore, decreasing order of energy of the given orbitals is 5f>6p>5p>4d.