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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pt188

Hypothetical elements A, B and C have Pauling electronegativities 0.9, 2.5 and 3.5 respectively. Using Pauling's relation, percent ionic character , which of the following statements is/are correct?

  1. AThe A-B bond is more polar than the B-C bond
  2. BThe A-C bond has the highest ionic character of the three
  3. CIn the B-C bond, C is the positive end
  4. DThe A-B bond has less than 50% ionic character

Answer: A, B, D

The differences are (A-B) = 1.6, (B-C) = 1.0 and (A-C) = 2.6. The ionic character is 47.3% for A-B, 22.1% for B-C and 81.5% for A-C. So A-B is more polar than B-C, A-C is the most ionic, and A-B is below 50%. C is the more electronegative atom, so it is the negative end of B-C, not the positive end.
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