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Among the following compounds, the one t...

Among the following compounds, the one that gets hydrolysed to form metallic hydroxide, hydrogen peroxide and oxygen is

A

`Na_2O `

B

`Na_2O_2`

C

`Li_2O `

D

`KO_2`

Text Solution

Verified by Experts

The correct Answer is:
D
Superoxides `(KO_2)` react with water to form hydroxide, hydrogen peroxide and oxygen .
`2KO_2 + 2H_2O to 2KOH + H_2O_2 + O_2`
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MODERN PUBLICATION-S-BLOCK ELEMENTS ( ALKALI AND ALKALINE EARTH METALS ) -COMPETITION FILE ( MULTIPLE CHOICE QUESTION (B))
  1. The products obtained on heating LiNO(3) will be

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  2. The strongest base among the following is

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  3. Among the following compounds, the one that gets hydrolysed to form me...

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  4. The alkaline earth metal with least density is

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  5. The reaction between sodium and water can be made less vigorous by

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  6. Alkali metals have negative reduction potential and hence they behave ...

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

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  8. The salt of alkali metal gives violet colour in the flame test. Its aq...

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  9. What is the product of reaction between calcium carbide and water?

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  10. The correct statement for the molecule, CsI(3) is

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  11. The decreasing order of acidic character is :

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  12. Match the elements given in Column I with the colour they impart to th...

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  13. Which of the following are arranged in correct increasing order of sol...

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  14. Which halide of magnesium has highest ionic character?

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  15. The low solubility of LiF and that of CsI in water are respectively du...

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

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

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  18. Which of the following is covalent?

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

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

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