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When is a cation highly polarising ? Whi...

When is a cation highly polarising ? Which alkali metal cation has the highest plorising power ?

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**Step-by-Step Solution:** 1. **Understanding Polarizing Power:** - A cation is considered highly polarizing when it has a high charge-to-size ratio. This means that the cation's charge is significant compared to its size. 2. **Charge-to-Size Ratio:** - The polarizing power of a cation is directly proportional to its charge and inversely proportional to its size. Therefore, a higher charge and a smaller size lead to higher polarizing power. ...
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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 Arranfe of the following species in dereasing order of polarising powers Ag^(o+),TI^(o+),Na^(o+) .

CENGAGE CHEMISTRY ENGLISH-S-BLOCK GROUP 1 - ALKALI METALS-Ex 4.1 (Subjective)
  1. The alkali metals follow the noble gases in their atomic structure. Wh...

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  2. What is atomic number of sodium and Why is sodium metal kept under ker...

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  3. When is a cation highly polarising ? Which alkali metal cation has the...

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  4. Why superoxides of of alkali metals are paramagnetic ?

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  5. Alkali metals are paramagnetic but their salts are dimagnetic. Explain...

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  6. Give reasons for the following. LiI has lower melting point than LiF...

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  7. The Haber process can be represented as follows

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  8. Why does the reaction. proceed better with KF than with NaF ?

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  9. why lithium is kept wrapped in paraffin wax and not stored in kerosene...

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  10. When is a cation highly polarising? Which alkali metal cation has the ...

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  11. Why cesium can be used in photoelectric cell, while lithium cannot be ...

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  12. Give reason for the decreasing order of the conductivity of the follow...

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  13. NaHCO(3) and NaOH cannot exist together in solution. Why ?

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  14. On exposure to air, sodium hydroxide becomes liquid and after sometime...

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  15. Alkali metals are obtained by the electrolysis of the molten salts and...

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  16. What happens when: a. Potassium metal is dropped in water b. Potas...

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  17. How is sodium carbonate manufactured by Solvay's process? Draw a schem...

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  18. a. Describe one method of manufacture of castic soda. b. What happen...

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  19. Answer the following: Give the name of the hardest alakli metal.

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  20. Explain the following: a. Alkali metals are paramagnetic, but their ...

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