2. Questions Bank
  3. JEE Main & Advanced
  4. Chemistry
  5. Structure of Atom / परमाणु संरचना

JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Mock Test - Atomic Structure

  • question_answer
    The electrons, identified by quantum numbers \[n\] and \[l\] (i) n = 4, \[l\]= 1, (ii) n = 4, \[l\]= 0, (iii) n = 3, \[l\]= 2, and (iv) n =3, \[l\] = 1 can be placed in order of increasing energy, from the lowest to highest, as

    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)
     


You need to login to perform this action.
You will be redirected in 3 sec spinner