Q9 / 90 · JEE Main 2023 (08 Apr Shift 1) · Chemistry

Given below are two statements :

Statement I : Lithium and Magnesium do not form superoxide

Statement II : The ionic radius of Li+ is larger than ionic radius of Mg2+ In the light of the above statements, choose the most appropriate answer from the questions given below :

In the light of the above statements, choose the most appropriate answer from the questions given below :

  • A
    Statement I is incorrect but Statement II is correct
  • B
    Statement I is correct but Statement II is incorrect
  • C
    Both statement I and Statement II are incorrect
  • Correct answer
    D
    Both Statement I and Statement II are correct

Solution

The values of ionic radii of Li+= 0.74 Åand Mg+2= 0.72 Å respectively. Thus, the lithium ion with +1 charge is only marginally larger than the magnesium ion having a charge of +2.

The superoxide releases the most energy when formed, the superoxide is preferentially formed for the larger metals where the more complex anions are not polarised. So, Li and Mg do not form superoxides.

Therefore both the given options were correct.

Hence, the correct answer is option: 'D'.

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