Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Na 2 O 2 -
A
Is diamagnetic in nature
B
Is salt of dibasic acid H 2 O 2
C
Oxidizes Cr 3+ (green) to CrO 
(yellow)
(yellow)
D
All are correct properties of Na 2 O 2
Text Solution
Verified by ExpertsThe correct answer is:
D
Na 2 O 2 has peroxide ion O 
(18e – ).
It has all paired electrons and is thus diamagnetic.
H 2 O 2 → 2H + + O 
Thus, it is also salt of dibasic acid H 2 O 2 . Cr 3+ is oxidised to CrO 
in acidic medium
Cr 3+ + 
+ 2H + → CrO 
+ H 2 O
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