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In hydrolysis, the alkali metal oxides, ...

In hydrolysis, the alkali metal oxides, peroxides and superoxides act as

A

Bronstead acid

B

Bronsted base

C

Lewis acid

D

Lewis base

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The correct Answer is:
D
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In hydroysis, the alkali metal oxdes, peroxides and superoxides 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-)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:

Alkali metals form peroxides and superoxides except

On exposure to air, alkali metals get tranished due to formation of oxides, hydroxides and carbonates on their surface. When heated in air or oxygen they burn vigourously forming different types of oxides depending upon the nature of the metal. The formation and stability of these metals can be explained on the basis of size of alkali metal ion and the anion. Peroxides are colourless, while superoxides are coloured. The normal oxides are basic while peroxides and superoxides act as oxidising agents. On heating in excess of oxygen, lithium gives

On exposure to air, alkali metals get tranished due to formation of oxides, hydroxides and carbonates on their surface. When heated in air or oxygen they burn vigourously forming different types of oxides depending upon the nature of the metal. The formation and stability of these metals can be explained on the basis of size of alkali metal ion and the anion. Peroxides are colourless, while superoxides are coloured. The normal oxides are basic while peroxides and superoxides act as oxidising agents. Oxone is

On exposure to air, alkali metals get tranished due to formation of oxides, hydroxides and carbonates on their surface. When heated in air or oxygen they burn vigourously forming different types of oxides depending upon the nature of the metal. The formation and stability of these metals can be explained on the basis of size of alkali metal ion and the anion. Peroxides are colourless, while superoxides are coloured. The normal oxides are basic while peroxides and superoxides act as oxidising agents. On heating in excess of oxygen, potassium gives

Write the formula of oxide, superoxide and peroxide of caesium.

NARAYNA-S-BLOCK ELEMENTS-Level Vi (Part - 2)
  1. Which of the following alkali metal halides has the lowest lattice ene...

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  2. Mark the false statement?

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  3. Polarizing power is

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  4. In hydrolysis, the alkali metal oxides, peroxides and superoxides act ...

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  5. Which is least soluble in water ?

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  6. Sodium reacts with water more vigorously than lithium because

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  7. Colour of iodine solution is discharged by shaking it with aqueous sol...

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  8. Identify the least stable among the following

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  9. Which of the folowing compounds liberates oxygen on heating?

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  10. Ionic hydrides react with water to

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  11. Which of the following is formed by the action of water on sodium pero...

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  12. Which is not a solid?

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  13. Which is not correctly matched? I) Basic strength of oxides Cs(2)O...

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  14. Which of the following act as an oxidising as well as reducing agent?

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  15. Which of the following statements is true for all the alkali metals ?

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  16. Property of all the alkali metals that decreases with their atomic num...

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  17. Select the incorrect statement with respect to sodium peroxide ?

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  18. Wwhich of the following statements are true about the alkali metals?

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  19. Which of the following staement(s) is (are) true?

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  20. Highly pure dilute solution of sodium in liquid ammonia :

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