JEE Main 2014 · 11 Apr · Shift 1 · Chemistry Q43

← JEE Main 2014 · 11 Apr · Shift 1

ChemistrySingle correct+4 / -1Question 43 of 90

Which of the following statements about $\ce{Na2O2}$ is not correct ?

It is diamagnetic in nature.

It is a derivative of

\ce{H2O2}

\ce{Na2O2}

oxidises

\ce{Cr^3+}

\ce{CrO4^2-}

in acid medium.

It is the super oxide of sodium.

Answer and worked solution

Official answer: D

$\ce{Na2O2}$ is sodium peroxide ( $\ce{O2^2-}$ , diamagnetic, a derivative of $\ce{H2O2}$ ), not a superoxide. Superoxides contain $\ce{O2-}$ , e.g. $\ce{KO2}$ .

Topics:Important compounds of s-block

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JEE Main 2014 · 11 Apr · Shift 1, Chemistry question 43