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In the case of alkali metals, the covalent character decreases in the order: [2009]
  • a)
    MF > MCl > MBr > MI
  • b)
    MF > MCl > MI > MBr
  • c)
    MI > MBr > MCl > MF
  • d)
    MCl > MI > MBr > MF
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
In the case of alkali metals, the covalent character decreases in the ...
MI > MBr > MCl > MF. As the size of the anion decreases covalency decreases.
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In the case of alkali metals, the covalent character decreases in the ...
The distortion of electron cloud of the anion by the cation is called polarisation. The cation which is very small in size,has the high tendency to distort electron cloud around the negative halide ion. Since anion with large size can be easily distorted, among halides, MI is the most covalent in nature and there goes the order. So the correct option is C.
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In the case of alkali metals, the covalent character decreases in the order: [2009]a)MF > MCl > MBr > MIb)MF > MCl > MI > MBrc)MI > MBr > MCl > MFd)MCl > MI > MBr > MFCorrect answer is option 'C'. Can you explain this answer?
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