Question Detail
Question
Which of the following pairs of Group 1 elements primarily form peroxides when reacted with oxygen?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Page 8 states, 'Sodium and potassium form peroxides containing the more complicated O₂²⁻ ion.' The reactions are 2Na + O₂ → Na₂O₂ and 2K + O₂ → K₂O₂.
Hint
Review the section on 'Formation of oxides, peroxides and superoxides'.