Which of the following molecules is nonpolar?

Practice Questions

Q1
Which of the following molecules is nonpolar?
  1. HCl
  2. CO2
  3. NH3
  4. H2O

Questions & Step-by-Step Solutions

Which of the following molecules is nonpolar?
  • Step 1: Understand what a nonpolar molecule is. A nonpolar molecule has an even distribution of electrical charge, meaning it does not have distinct positive or negative ends.
  • Step 2: Look at the given molecule, CO2 (carbon dioxide).
  • Step 3: Determine the shape of CO2. CO2 is a linear molecule, which means the atoms are arranged in a straight line.
  • Step 4: Identify the symmetry in CO2. Since CO2 has two oxygen atoms on either side of the carbon atom, it is symmetrical.
  • Step 5: Understand dipole moments. A dipole moment occurs when there is a difference in charge distribution. In CO2, the dipole moments from the carbon-oxygen bonds cancel each other out due to the symmetry.
  • Step 6: Conclude that because the dipole moments cancel out, CO2 does not have a net dipole moment, making it a nonpolar molecule.
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