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Which has maximum polarising power in ca...

Which has maximum polarising power in cation ?

A

`O^(2-)`

B

`Al^(+3)`

C

`Li^(+)`

D

`Mg^(+2)`

Text Solution

Verified by Experts

The correct Answer is:
B
Small cation has more polarising power. Cation with `+3` charge is the smallest.
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in an ionic bond the cation tends to polarise the electron cloud of the anion by pulling electron density towards itself This causes development of covalent character in the ionic bond because the electron density gets localised in between the nuclei The tendency of the cation to bring about the polarisation of the anion is expressed as its polasising power The ability of ion to undergo polarisation is called its polarisability The polarising power of a cation or an anion is decided on the basis of F ajans' rules as follows . (i) The smaller the cation, the higher is its polarising power (ii) Cations with pseudo-noble gas configuration (ns^(2)np^(6)nd^(10)) have relatively high polarising power than those with noble gas configuration (ns^(2) np^(6)) (iii) The larger the size of the anion, the higher is its polarisability The ionic conductance of which of the following is the highest ? .

in an ionic bond the cation tends to polarise the electron cloud of the anion by pulling electron density towards itself This causes development of covalent character in the ionic bond because the electron density gets localised in between the nuclei The tendency of the cation to bring about the polarisation of the anion is expressed as its polasising power The ability of ion to undergo polarisation is called its polarisability The polarising power of a cation or an anion is decided on the basis of F ajans' rules as follows . (i) The smaller the cation, the higher is its polarising power (ii) Cations with pseudo-noble gas configuration (ns^(2)np^(6)nd^(10)) have relatively high polarising power than those with noble gas configuration (ns^(2) np^(6)) (iii) The larger the size of the anion, the higher is its polarisability Among the following which will have the lowest metlting point and the highest solubility LiCI,BeCI_(2),BCI_(3),C CI_(4) .

Knowledge Check

  • Which of the following ions has the maximum polarising power?

    A
    `Na^+`
    B
    `Ca^+2`
    C
    `Mg^+2`
    D
    `Al^+3`

  • Which of the following ions has the maximum polarising power?

    A
    `Na^(+)`
    B
    `Ca^(2+)`
    C
    `Mg^(2+)`
    D
    `Al^(3+)`

  • in an ionic bond the cation tends to polarise the electron cloud of the anion by pulling electron density towards itself This causes development of covalent character in the ionic bond because the electron density gets localised in between the nuclei The tendency of the cation to bring about the polarisation of the anion is expressed as its polasising power The ability of ion to undergo polarisation is called its polarisability The polarising power of a cation or an anion is decided on the basis of F ajans' rules as follows . (i) The smaller the cation, the higher is its polarising power (ii) Cations with pseudo-noble gas configuration (ns^(2)np^(6)nd^(10)) have relatively high polarising power than those with noble gas configuration (ns^(2) np^(6)) (iii) The larger the size of the anion, the higher is its polarisability Arranfe of the following species in dereasing order of polarising powers Ag^(o+),TI^(o+),Na^(o+) .

    A
    `TI^(o+) gtAg^(o+) gtNa^(o+)`
    B
    `TI^(o+) gtAg^(o+) gtAg^(o+)`
    C
    `Ag^(o+) gtTI^(o+) gtNa^(o+)`
    D
    `Na^(o+) gtTI^(o+) gtAg^(o+)`

    • Similar Questions

    Explore conceptually related problems

    in an ionic bond the cation tends to polarise the electron cloud of the anion by pulling electron density towards itself This causes development of covalent character in the ionic bond because the electron density gets localised in between the nuclei The tendency of the cation to bring about the polarisation of the anion is expressed as its polasising power The ability of ion to undergo polarisation is called its polarisability The polarising power of a cation or an anion is decided on the basis of F ajans' rules as follows . (i) The smaller the cation, the higher is its polarising power (ii) Cations with pseudo-noble gas configuration (ns^(2)np^(6)nd^(10)) have relatively high polarising power than those with noble gas configuration (ns^(2) np^(6)) (iii) The larger the size of the anion, the higher is its polarisability Choose the correct order of polarisability for the following I^(Θ),Br^(Θ),CI^(Θ)F^(Θ) .

    Assertion Among two cations of similar size the polarising power of cation with pseudo noble gas configuration is larger than cation with noble gas configuration Reasoning Polarising power of Ag^(o+) is more than K^(o+) .

    The correct order of increasing polarising power of the cations in AlCl_(3), MgCl_(2) and NaCl is

    The correct order of increasing polarising power of the cations in the following AlCl_(3) , MgCl_(3) , NaCl is

    Which one have maximum power of adaptation :–

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