Identify the polarity of each molecule.
i. H₂Se
ii. BI₃
iii. CH₃F
iv. NFCl₂

• A. i. H₂Se: nonpolar
  ii. BI₃: nonpolar
  iii. CH₃F: polar
  iv. NFCl₂: polar
• B. i. H₂Se: polar
  ii. BI₃: polar
  iii. CH₃F: nonpolar
  iv. NFCl₂: nonpolar
• C. i. H₂Se: nonpolar
  ii. BI₃: polar
  iii. CH₃F: nonpolar
  iv. NFCl₂: polar
• D. i. H₂Se: polar
  ii. BI₃: nonpolar
  iii. CH₃F: polar
  iv. NFCl₂: polar

Answer: (D)