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MCAS Chemistry Exam Practice

Category - Chemistry

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Which of the following statements explains why the bond in hydrogen chloride (HCl) is polar covalent?
  1. The atomic mass of chlorine is greater than that of hydrogen.
  2. The electronegativity of chlorine is greater than that of hydrogen.
  3. The diameter of a chlorine atom is greater than that of a
    hydrogen atom.
  4. The number of valence electrons in a chlorine atom is greater than that in a hydrogen atom.
Explanation
Answer: B - The electronegativity of chlorine is greater than that of hydrogen.
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