Question

Peroxide and super oxides of alkali metals are coloured because of

• A. Defects in crystals
• B. Presence of unpaired electrons
• C. Partially due to the defects and partially due to presence of unpaired electrons
• D. None of the above

Answer 1

Answer: (C)

Partially due to the defects and partially due to presence of unpaired electrons

Answer 2

It is due to $(i)$ presence of defects and $(ii)$ due to the presence of unpaired electrons.