JEE Main Chemistry question

Which pair of elements would form the most ionic bond?

(A)H,Cl
(B)K,ClCorrect
(C)B,N
(D)C,O

Answer: (B)

Solution

Ionic character of a bond increases with the electronegativity difference between the two atoms. Potassium (highly electropositive) and chlorine (highly electronegative) have by far the greatest electronegativity difference among these pairs,

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Question ID VK-137793