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Consider the following ion 1. Ni2+ 2. Co2+ 3. Cr2+ 4. Fe3+ (Atomic number : Cr = 24, Fe = 26, Co = 27 and Ni = 28) The correct sequence of increasing number of unpaired electrons in these ions is 

(1) 1, 2, 3, 4 

(2) 4, 2, 3, 1 

(3) 1, 3, 2, 4 

(4) 3, 4, 2, 1

1 Answer

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Best answer

Correct option  (1) 1, 2, 3, 4

Explanation:

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