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Topic 4: Chemical
. bonding

19. Molecular polarity: Determining formula of polar and nonpolar molecules

1. Which formula represents a polar molecule? 3) CH4 4) NH3

1) Br2
2) CO2

2. Which molecule is polar?
1) H2 2) N2 3) CH4 4) HF
3. Which formula represents a polar molecule? 3) Cl2 4) NaCl

2) PCl2
1) KCl

4. The molecule of which substance is polar? 3) H2 4) CH4

2) N2

1) H2S

5. Which formula represents a polar molecule containing polar covalent bonds. 4) CO2
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1) HBr
3) CH4
2) CCl4

6. The molecules of which substance is nonpolar? 3) CH4 4) HI
2) H2O

1) NaCl

7. Which formula represent a nonpolar molecule containing nonpolar bonds?
1) KCl 2) O2 3) NH3 4) CH4

8. The formula of which substance represents a nonpolar molecule containing nonpolar bonds?
1) CH4 2) CO2 3) H2O 4) N2

9. Which formula represents a nonpolar molecule containing polar covalent bonds?
1) CO2 2) HBr 3) K2O 4) H2
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10. The formula of which substance represents a nonpolar molecule with polar covalent bonds?

3) CH4
2) Na

4) Cl2

1) NH3

11. The shape and bonding in Hydrogen fluoride, HF, are best described as
1) Symmetrical and polar 3) Asymmetrical and polar
2) Symmetrical and nonpolar 4) Asymmetrical and nonpolar

12. The shape and bonding in diatomic bromine molecule are best described as
1) Symmetrical and polar 3) Asymmetrical and polar
2) Symmetrical and nonpolar
4) Asymmetrical and nonpolar

13. Which best explains why CCl4 molecule is nonpolar? 3) CCl4 is a gas at room temperature
1) CCl4 has a symmetrical charge distribution
2) C and Cl have the same electronegativity 4) C and Cl are nonmetals
14. Two fluorine atoms are held together by a covalent bond to form F2. Which statement correctly
describes the bond and the molecular polarity of F2?
1) The bond is polar, and F2 is a polar molecule
2) The bond is polar, and F2 is a nonpolar molecule
3) The bond is nonpolar, and F2 is a polar molecule
4) The bond is nonpolar, and F2 is a nonpolar molecule

15. Which best describes the bonding in a molecule of ammonia, NH3?
1) The bonding is polar, and NH3 is a polar molecule
2) The bonding is polar, and NH3 is a nonpolar molecule
3) The bonding is nonpolar, and NH3 is a polar molecule
4) The bonding is nonpolar, and NH3 is a nonpolar molecule

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