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In which of the following arrangements, ...

In which of the following arrangements, the sequence is not strictly according to the property written against it?

A

`CO_(2)ltSiO_(2)ltSnO_(2)ltPbO_(2)` : Increasing oxidising power

B

`HF lt HCl lt HBr lt HI`: Increasing acid strength

C

`NH_(3) lt PH_(3)ltAsH_(3)ltSbH_(3):` Increasing basic strength

D

`B lt C lt O lt N`: Increasing first ionisation enthalpy.

Text Solution

Verified by Experts

The correct Answer is:
C
On moving down the group, the size of central atom increases. Due to this, availability of lone pair of electrons decreases. Hence the basic character decreases.
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Knowledge Check

  • In which of the following arrangement, the sequence is not strictly according to the property written against it ?

    A
    `NH_3 lt PH_3 lt AsH_3 lt SbH_3` : increasing basic strength
    B
    B lt C lt O lt N : increasing first ionisation enthalpy
    C
    `CO_2 lt SiO_2 lt SnO_2 lt PbO_2` : increasing oxidation power
    D
    HF lt HCl lt HBr lt HI : increasing acid strength

  • In which of the following arrangements the order is NOT according to the property indicated against it?

    A
    `Al^(3+)ltMg^(2+)gtNa^(2+)gtF^(-)` - increasing ionic size
    B
    `BltCltNltO` - increasing first ionization enthalpy
    C
    `IltBrltFltCl` - increasing electron gain enthalpy (with negative sign)
    D
    `LiltNaltKltRb` - increasing metallic radius.

  • Which of the following arrangements does not represent the correct order of the property stated against it?

    A
    `Sc lt Ti lt Cr lt Mn:` number of oxidation states
    B
    `V^(2+) lt Cr^(2+) lt Mn^(2+) lt Fe^(2+)`: paramagnetic behaviour
    C
    `Ni^(2+) lt Co^(2+) lt Fe^(2+) lt Mn^(2+):` Ionic size
    D
    `Co^(3+) lt Fe^(3+) lt Cr^(3+) lt Sc^(3+)`: stability in aqueous solution.

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    Which of the following is correct sequence in Kre's cycle?

    Which one of the following does not correctly represent the correct order of the property indicated against it

    Which one of the following orders is not in accordance with the property stated against it ?

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