Q41 / 213 · NTA Abhyas (NEET) 2020 · Chemistry · s Block Elements

Consider the following reaction
M+O2→MO2
(M = alkali metal) (stable superoxide)

  • Correct answer
    A
    M can not be Li and Na
  • B
    M can not be Cs and Rb
  • C
    M can not be Li and Rb
  • D
    None of these

Solution

The tendency to form superoxides among alkali metals increases down the group. Here Li and Na do not form stable superoxide.

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

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