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The correct order of increasing thermal ...

The correct order of increasing thermal stability of `K_(2)CO_(3),MgCO_(3),CaCO_(3),` and `BeCO_(3)` is

A

`BeCO_(3)ltMgCO_(3)ltCaCO_(3)LtK_(2)CO_(3)`

B

`MgCO_(3)ltBeCO_(3)ltCaCO_(3)ltK_(2)CO_(3)`

C

`K_(2)CO_(3)ltMgCO_(3)ltCaCO_(3)ltBeCO_(3)`

D

`BeCO_(3)ltMgCO_(3)ltK_(2)CO_(3)ltCaCO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
1
More the polarising power of cation more is the distortion on `CO_(3)^(2-)` ions.More will be the instability-Hence the order of increasinig thermal stability is `BeCO_(3)ltMgCO_(3)CaCO_(3)ltK_(2)CO_(3)`
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Knowledge Check

  • Correct order of decreasing thermal stability is

    A
    `NH_(3) gt PH_(3) gt AsH_(3) gt SbH_(3)`
    B
    `PH_(3) gt NH_(3) gt AsH_(3) gt SbH_(3)`
    C
    `AsH_(3) gt PH_(3) gt NH_(3) gt SbH_(3)`
    D
    `SbH_(3) gt AsH_(3) gt PH_(3) gt NH_(3)`

  • The correct order of thermal stability of hydroxide is

    A
    `Mg (OH ) _(2) lt Sr (OH ) _(2) lt Ca ( OH ) _(2) lt Ba ( OH) _(2)`
    B
    `Mg ( OH ) _(2) lt Ca (OH ) _(2) lt Sr (OH) _(2) lt Ba (OH) _(2)`
    C
    `B a (OH) _(2) lt Sr (OH) _(2) lt Ca (OH) _(2) lt Mg ( OH) _(2)`
    D
    `Ba ( OH) _(2) lt Ca( OH ) _(2) lt Sr ( OH) _(2) lt Mg ( OH) _(2)`

  • Thermal stability of BaCO_(3), CaCO_(3), and MgCO_(3) is

    A
    `BaCO_(3) gt CaCO_(3) gt MgCO_(3)`
    B
    `BaCO_(3) gt MgCO_(3) gt CaCO_(3)`
    C
    `CaCO_(3) gt MgCO_(3) gt BaCO_(3)`
    D
    `MgCO_(3) gt CaCO_(3) gt BaCO_(3)`

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