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Solution


Q.

Given below are two statements:

Statement (I): The orbitals having same energy are called as degenerate orbitals.

Statement (II): In hydrogen atom, 3p and 3d orbitals are not degenerate orbitals.

In the light of the above statements, choose the most appropriate answer from the options given below:            [2024]
1 Statement I is true but Statement II is false  
2 Both Statement I and Statement II are true  
3 Both Statement I and Statement II are false  
4 Statement I is false but Statement II is true  

Ans.

(1)            

Different subshells of a particular shell have different energies in the case of multi- electrons atoms. AIl the orbitals within the same subshell have the same energy, these are called degenerate orbitals. In a multielectron system energy of an orbital depends upon its (n+l) value. The higher the value of (n+l), more is the energy of the orbital.

     However, in a hydrogen atom, all the subshells in a shell have the same energy i.e. value of energy depends only upon value of n and not upon (n+l). 3p and 3d orbitals in hydrogen atoms have same energy (degenerate).