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  • Which one of the alkali metals forms only, the normal oxide, on hea

Which one of the alkali metals forms only, the normal oxide, \mathrm{M_2 \mathrm{O}} on heating in air?
 

Option: 1

\mathrm{\mathrm{Rb}}


Option: 2

\mathrm{k}


Option: 3

\mathrm{Li}
 


Option: 4

\mathrm{Na}


Answers (1)

best_answer

when alkali metals heated in atmosphere of oxygen, the alkali metals ignite and form oxides. On combustion \mathrm{L i} forms \mathrm{\mathrm{Li}_2 \mathrm{O}}, sodium gives the peroxide \mathrm{Na}_2 \mathrm{O}_2 and potassium and rubidium give supersoxide \left(\mathrm{MO}_2\right)

Hence option 3 is correct.

Posted by

Suraj Bhandari

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