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JEE Main 201411 AprilOnline

Exam: JEE Main
Year: 2014
Date: 11 April
Mode: Online
Subject: Chemistry
Chapter: s Block Elements

JEE Main 2014 · 11 April · Online · Chemistry · s Block Elements

Which of the following statements about Na_2 O_2 is not correct?

Which of the following statements about

\mathrm{Na}_2 \mathrm{O}_2

is not correct?

Options

AIt is diamagnetic in nature
BIt is derivative of $\mathrm{H}_2 \mathrm{O}_2$
C $\mathrm{Na}_2 \mathrm{O}_2$ oxidises $\mathrm{Cr}^{3+}$ to $\mathrm{CrO}_4^{2-}$ in acid medium.
DIt is the super oxide of sodium

Correct answer

D. It is the super oxide of sodium

Step-by-step solution

\mathrm{Na}_2 \mathrm{O}_2

is peroxide of sodium not super oxide. The formula of sodium superoxide is

\mathrm{NaO}_2

.

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