Single Choice

Which of the following statements about $$Na_2O_2$$ is not correct?

A$$Na_2O_2$$ oxidises $$Cr^{3+}$$ to $$CrO_4^{2-}$$ in acid medium
BIt is a derivative of $$H_2O_2$$
CIt is the super oxide of sodium
Correct Answer
DIt is diamagnetic in nature

Solution

$$\displaystyle Na_2O_2$$ is peroxide of sodium. It contains peroxide ion $$\displaystyle O_2^{2-}$$ which can be represented as $$^-O-O^-$$.

Hence, it is considered as derivative of hydrogen peroxide $$H_2O_2$$.

Monoxide ion is $$\displaystyle O^{2-}$$.

Superoxide ion is $$\displaystyle{ O }_2^-$$

Usually sodium forms the peroxide $$Na_2O_2$$.

It does not contain any unpaired electrons, thus it is diamagnetic in nature.

Hence, option $$C$$ is not correct about $$Na_2O_2$$.

SIMILAR QUESTIONS

d - block and f - block Elements

Compounds of which of the following transition elements do not exhibit an oxidation state of +3?

d - block and f - block Elements

Mercurous ion is represented as:

d - block and f - block Elements

The element that acts as a good catalyst for several reactions has a atomic number:

d - block and f - block Elements

The element that usually does not show variable oxidation states is :

d - block and f - block Elements

Which one of the following exhibits the largest number of oxidation states?

d - block and f - block Elements

In context with the transition elements, which of the following statements is incorrect?

d - block and f - block Elements

Which one of the following species is stable in aqueous solution

d - block and f - block Elements

Iron exhibits +2 and +3 oxidation states. Which of the following statements about iron is incorrect?

d - block and f - block Elements

The correct statement(s) about $$\displaystyle Cr^{2+}$$ and $$\displaystyle Mn^{3+}$$ is(are): $$\displaystyle \mathrm {\left [ Atomic\ numbers\ of\ Cr = 24\ and\ Mn = 25 \right ]}$$

d - block and f - block Elements

The oxidation number of Mn in the product of alkaline oxidative fusion of $$MnO_{2}$$ is:

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