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The main oxides formed on combustion of ...

The main oxides formed on combustion of Li,Na and K in excess of air respectively are

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The correct Answer is:
D
Li forms oxide , `Li_2O`, Na forms peroxide , `Na_2O_2` and K forms super oxide , `KO_2` .
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MODERN PUBLICATION-S-BLOCK ELEMENTS ( ALKALI AND ALKALINE EARTH METALS ) -COMPETITION FILE ( MULTIPLE CHOICE QUESTION (B))
  1. The low solubility of LiF and that of CsI in water are respectively du...

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  2. The second ionization enthalpy of which of the following alkaline eart...

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  3. The main oxides formed on combustion of Li,Na and K in excess of air r...

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  4. Which of the following is covalent?

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  5. When 1 mole of a substance (X) was treated with an excess of water, 2 ...

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  6. Both lithium and magnesium display several similar properties due to t...

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  7. Dead burnt plaster is

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  8. Portland cement does not contain

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  9. Which of the following is least thermally stable ?

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  10. A metal on combustiion in excess air forms X.X upon hydrolysis with wa...

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  11. The correct statement(s) among I to III with respect to potassium ions...

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  12. What is the colour of the flame on heating potassium in the flame of a...

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  13. The metal nitrate that liberates NO2 on heating

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  14. Which among the following is correct for electrolysis of brine solutio...

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  15. What is diagonal relationship ? Discuss the diagonal relationship betw...

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  16. The metal that forms nitride by reacting directly with N(2) of air , i...

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  17. The incorrect statement is :

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  18. The correct order of hydration enthalpies of alkali metal ions is:

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  19. Match the following item in column I with the corresponding items in C...

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  20. The alkaline earth metal mitrate that does not crystallise with water ...

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