The element which cannot form peroxide is

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Among the alkali metals,$Li$ reacts with oxygen to form only the monoxide $(Li_2O)$ because the $Li^+$ ion is very small and has a high charge den

Vedclass · Accepted Answer

$Li$

Vedclass · Answer

(C) Among the alkali metals,$Li$ reacts with oxygen to form only the monoxide $(Li_2O)$ because the $Li^+$ ion is very small and has a high charge density,which stabilizes the small $O^{2-}$ ion. It cannot form a peroxide $(Li_2O_2)$ or superoxide $(LiO_2)$ because the larger peroxide and superoxide ions are not stable in the presence of the small $Li^+$ ion. $Na$ forms peroxide $(Na_2O_2)$,while $Sr$ and $Ba$ (alkaline earth metals) form peroxides ($SrO_2$ and $BaO_2$ respectively).

Similar Questions

White metal is an alloy of

All the $s$-block elements of the periodic table are placed in the groups...

Assertion $A$: Alkali metals impart characteristic colors to the flame in the flame test.
Reason $R$: They have very low ionization enthalpy.

Which of the following is an ore of potassium?

When burnt in excess of oxygen,sodium forms a compound $X$ and potassium forms a compound $Y$. The magnetic natures of $X$ and $Y$ respectively are

Vedclass Test Series

Exam Paper Generator

Online Exam Module