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On exposure to air, alkali metals get ta...

On exposure to air, alkali metals get tarnished due to formation of oxides, hydroxides and carbonates on their surface. When heated in air or oxygen they burn vigorously 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

A

CaO

B

`N_(2)O`

C

`Na_(2)O_(2)`

D

`NaBO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
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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. On heating in excess of oxygen, potassium 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. Among NaO_(2), Na_(2)O_(2), Li_(2)O, CsO_(2) upaired electron is present in

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CENGAGE CHEMISTRY-S-BLOCK GROUP 1 - ALKALI METALS-Exercises Single Correct
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  2. Among LiCI, RbCI, BeCI(2) and MgCI(2) the compound with the greatest a...

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  3. which of the following compounds on reaction with NaOh and H(2)O(2) gi...

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  4. stable oxide is obtained by heating the carbonate of the elements

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  5. Ease with which hydrides are formed form Li to Cs:

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  6. For the preparation of sodium thiouslphyate by "Spring's reaction', th...

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  7. Li(2)SO(4) is not isomorphous with sodium sulphate:

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  8. Prefix 'alkali' for alkali metals denotes:

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  9. The chloride that can be extrated with ether is

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  10. Which of the following has the lowest melting point ?

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  11. On exposure to air, alkali metals get tarnished due to formation of ox...

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  12. In view of their low ionisation energies, the alkali metals are

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  13. which of the following has the lowest melting point ?

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  14. When sodium is treated with sufficient oxygen/air, the product obtaine...

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  15. The products of electrolysis of concentrated common salt solution are

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  16. Elements in the firsdt column of the periodic table are called alkali ...

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  17. One of the natural minerals of sodium is tincal. Its formula is

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  18. Na(2)CO(3)+Fe(2)O(3)rarr A+CO(2), what is A in the reaction ?

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  19. When dry ammonia gas is passed over hated sodium (out of contact of ai...

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  20. The principal products obtained on heating iodine with cold and concen...

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