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In the formation of superoxide M+O(2)t...

In the formation of superoxide
`M+O_(2)toMO_(2),` the metal M is

A

Li

B

Na

C

K

D

Ba

Text Solution

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The correct Answer is:
3
Larger alkali metals forms (K,Rb,Cs) super oxides
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Following information are known abot a metal M : I. A salt of metal M is used in the manufacture of gunpowder. II. The superoxide of metal M is used as an air purifier in submarines. III. The hydroxide of metal M is used for the absorption of gases like CO_(2),SO_(2) , etc. in eudiometry. Identify the metal M :

Lithium only forms monoxide when heated in oxygen. Sodium forms monoxide and peroxide in excess of oxygen. Other alkali metals form superoxide metals superoxide with oxygen i.e., MO_(2) . The abnormal behaviour of lithium is due to small size. The larger size of higher metals also decides the role in formation of superoxide. All the three anions abstract proton from water. The three anions are raleted to each other as follows: underset("oxide ion")(O^(2-)overset((1)/(2)O_(2))(to)underset("peroxide ion")(O_(2)^(2-))overset(O_(2))(to)underset("superoxide ion")(2O_(2)^(-)) Q. In hydrolysis, the alkali metals oxides, peroxide and superoxide act as:

Lithium only forms monoxide when heated in oxygen. Sodium forms monoxide and peroxide in excess of oxygen. Other alkali metals form superoxide metals superoxide with oxygen i.e., MO_(2) . The abnormal behaviour of lithium is due to small size. The larger size of higher metals also decides the role in formation of superoxide. All the three anions abstract proton from water. The three anions are raleted to each other as follows: underset("oxide ion")(O_(2)^(2-)overset((1)/(2)O_(2))(to)underset("peroxide ion")(O_(2)^(2-))overset(O_(2))(to)underset("superoxide ion")(2O_(2)^(-)) Q. Which compounds will liberate oxygen when reacts with ice cold water?