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As we descend in the electrochemical ser...

As we descend in the electrochemical series containing cations, the tendency of the cations to get .... ............ at the cathode increases.

A

oxidised

B

reduced

C

increased

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
As we descend the electrochemical series containing cations, reduction potential increases, and thus the tendency to get reduced is increased, so the tendency of the cations to get reduced at the cathode increases.
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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 Choose the correct order of polarisability for the following I^(Θ),Br^(Θ),CI^(Θ)F^(Θ) .

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ICSE-ELECTROLYSIS-Fill in the Blanks
  1. The solution of a substance which conducts electricity is called ……………...

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  2. An electrolyte is a ............

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  3. A weak electrolyte is one which ........

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  4. A strong electrolyte is one which .......

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  5. Sodium chloride is ..........

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  6. Water is .........

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  7. ........... is a non-electrolyte.

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  8. Pure water consists almost entirely of ……………

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  9. In the electrolysis of acidulated water, oxygen is produced by the dis...

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  10. Ionisation is a …………………… process.

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  11. The gas given off at cathode during the electrolysis of acidulated wat...

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  12. With platinum electrodes, hydrogen is liberated at the ………… and oxygen...

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  13. As we descend in the electrochemical series containing cations, the te...

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  14. The electrode where the current enters in to the electrolyte is called...

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  15. The negative electrode in electrolysis is called the.......

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  16. Cations migrate to............during electrolysis.

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  17. During electrolysis, anions undergo……………. At the ………………..

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  18. The reactions occurring at the cathode during electrolysis involve.......

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  19. In a voltaic cells, the salt bridge ........

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  20. In a solution or molten state, a ........... electrolyte consists almo...

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