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

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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`

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