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Molecular Polarity (Grade 10)

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Molecular Polarity

Which of the following is a polar molecule?
  1. [math] CH_4 [/math]
  2. Xe
  3. [math] H_2 O [/math]
  4. [math] CO_2 [/math]
Which of the following describes the charge distribution and molecular polarity of [math] NH_3 [/math]?
  1. even distribution and polar
  2. uneven distribution and nonpolar
  3. uneven distribution and polar
  4. even distribution and nonpolar
Which phrase correctly describes the distribution of charge and the molecular polarity of ethane?
  1. symmetrical and polar
  2. asymmetrical and polar
  3. asymmetrical and nonpolar
  4. symmetrical and nonpolar
Which of the following molecular geometries could be nonpolar?
  1. bent
  2. tetrahedral
  3. trigonal pyramidal
  4. none of the above
Which statement correctly describes NaCl?
  1. Its charge is distributed evenly.
  2. It is a polar molecule.
  3. It is ionic, and its charges are distributed very unevenly.
  4. It contains polar covalent bonds.
Which formula represents a nonpolar molecule?
  1. [math]HBr[/math]
  2. [math] H_2S [/math]
  3. [math] CBr_4 [/math]
  4. [math] PCl_3 [/math]
Which of the following molecules, based on the elements present, would be the most polar?
  1. HF
  2. [math] H_2 [/math]
  3. HCl
  4. HBr
Which statement explains why ethene does not dissolve in water?
  1. Ethene is polar and water is nonpolar.
  2. Ethene is nonpolar and water is nonpolar.
  3. Ethene is polar and water is polar.
  4. Ethene is nonpolar and water is polar.
Compare the solubilities of iodine solid, [math] I_2 (s) [/math], and glucose, [math] C_6 H_12 O_6 (s) [/math], in water, based on their molecular polarities.

A molecule containing polar covalent bonds is always polar.
  1. True
  2. False
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