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The alkali metals which form normal oxid...

The alkali metals which form normal oxide, peroxides as well as super oxides are :

A

`Na, Li`

B

`K, Li`

C

`Li,Cs`

D

`K,Rb`

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The correct Answer is:
D
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A metal which forms an amphoteric oxide.

Alkali metals burn in air to form oxides, peroxides and superoxides. Lithium burns in moist air to form normal oxide as the major product. Some lithium nitride is also formed if nitrogen is present. Sodium loses lustre and forms both normal oxide and peroxide, the peroxide being the major product. Rest of all alkali metals form peroxides. All metals can be forced to form oxides, peroxides and superoxides by dissolving in liquid ammonia and bubbling appropriate amount of O_(2) . Which of the following oxides is the strongest oxidising agent :

Alkali metals burn in air to form oxides, peroxides and superoxides. Lithium burns in moist air to form normal oxide as the major product. Some lithium nitride is also formed if nitrogen is present. Sodium loses lustre and forms both normal oxide and peroxide, the peroxide being the major product. Rest of all alkali metals form peroxides. All metals can be forced to form oxides, peroxides and superoxides by dissolving in liquid ammonia and bubbling appropriate amount of O_(2) . Which among the following oxides turn red litmus paper blue :

Name two metals which form amphoteric oxides.

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

DISHA PUBLICATION-THE s-BLOCK ELEMENTS-Exercise - 1 : Concept Builder (Topicwise)(TOPIC 1 : Preparation and Properties of Alkali Metals and their Compounds)
  1. Which of the following is known as fusion mixture ?

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  2. The dominant cation in the blood plasma (extracellular fluid) is

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  3. Among LiI, NaI, KI the one which is more ionic and more soluble in wat...

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  4. Based on lattice energy and other considerations which one of the foll...

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  5. The correct order of radii is A)N lt Be lt B B)F^(-) lt O^(2-) lt N^...

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  6. The melting point of lithium (181^(@)C) is just double the melting poi...

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  7. Alkali metals are generally extracted by

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  8. Which of the following has the least ionization potential ?

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  9. Fires, that result from the combustion of alkali metals can be extingu...

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  10. The stability of the following alkali metal chlorides follows the orde...

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  11. The order of solubility of lithium halides in non-lolar solvents follo...

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  12. Alkali metals form peroxides and superoxides except

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  13. Which of the following is used as a source of oxygen in square capsule...

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  14. Which of the following statements is false for alkali metals ?

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  15. Which of the following statements is correct for CsBr(3)?

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  16. The solubility order for alkali metal fluoride in water is :

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  17. An alloy of which pair of metals is liquid at ordinary temperature and...

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  18. An alkaline metal oxide which is soluble in NaOH has

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  19. The alkali metals which form normal oxide, peroxides as well as super ...

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  20. Which of the following compounds are paramagnetic in nature?

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