Polarity of Molecules<BLURT>

Polarity of Molecules


1. When the atoms within molecules have different electronegativities, the electrons are shared unequally and the bonds are ________. A. nonpolar
B. polar
C. shifted
D. charged


2. Polarity is a key feature of a molecule because it can influence ___________ properties of the molecule. A. chemical
B. physical
C. biological
D. All of these are correct.


3. Which of the three statements below is/are TRUE?
  1. Diatomic molecules with atoms of different electronegativity are polar.
  2. In an electric field, polar molecules line up with their +d ends toward the positive plate.
  3. The more electronegative atom in a polar diatomic molecule will have a partial positive charge.
A. i) only
B. i) and ii)
C. ii) and iii)
D. i) and iii)
E. iii) only


4. Choose the molecule that has polar bonds but does NOT orient within an electric field. A. HCl
B. Cl2
C. CCl4
D. NH3
E. CHCl3


5. Molecules of which of these substances will become oriented within an electric field? A. BF3
B. CCl4
C. trans-C2H2Cl2
D. C2Cl4
E. cis-C2H2Cl2
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