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Name an element which is invariably biva...

Name an element which is invariably bivalent and whose oxide is soluble in excess of `NaOH` and its di-positive ion has a noble gas core.

Text Solution

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Beryllium BeO dissolves in NaOH to form sodium beryllate.
`BeO + 2NaOH to Na_2BeO_2 + H_2O`.
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Knowledge Check

  • An alkaline metal oxide which is soluble in NaOH has

    A
    `NaCl` structure
    B
    wurzite structure
    C
    `CsCl` structure
    D
    rutile structure

  • The hydroxide of which metal ion(s) which is/are soluble in excess of NaOH solution

    A
    `A1^(3+)`
    B
    `zn^(2+)`
    C
    `Fe^(3+)`
    D
    `Cu^(2+)`

  • An element M forms insoluble hydroxide, which is soluble in both excess of NaOH and excess of NH_(3) solution, element M is:

    A
    `AI`
    B
    `Pb`
    C
    `Zn`
    D
    `Fe`
    • MODERN PUBLICATION-S-BLOCK ELEMENTS ( ALKALI AND ALKALINE EARTH METALS ) -HIGHER ORDER THINKING SKILLS
    1. Name an element which is invariably bivalent and whose oxide is solubl...

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    2. BeCl2 gives an acidic solution when dissolved in water. Why?

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    3. Alkali metal ions are colourless as well as diamagnetic. Explain

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    4. Lil3 is less stable than CsI3. Why?

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    5. Describe the difference in structure between CaH2 and BeH2

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    6. Why it LiF almost insoluble in water while LiCl is soluble not only in...

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    7. The alkali metal having low melting point is

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    8. LiH, LiF and Li(3)N show exceptional thermal stabilites. Comment.

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    9. The combustion of Li, Na, K in excess of air gives major oxides

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    10. Which alkali metal carbonate is thermally unstable and why?

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    11. Which out of the following and why can be used to store an alkali meta...

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    12. Mg^(2+) ion more highly hydrated than Na^(+) ion.

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    13. Explain the following: (a) Be(OH)2 dissolves in sodium hydroxide bu...

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    14. MgN(2) when reacted with water gives NH(3) and HCl. However, MgCl(2) d...

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    15. LiH is more stable than NaH. Explain.

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    16. Sodium fire in the laboratory should not be extinguished by using wate...

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    17. In the reaction of sodium hydride and water:

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    18. The crystalline salts of alkaline earth metals contain more water of c...

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