# Molecular Polarity (Grade 10)

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## Molecular Polarity

1.

Which of the following is a polar molecule?

- [math] CH_4 [/math]
- Xe
- [math] H_2 O [/math]
- [math] CO_2 [/math]

2.

Which of the following describes the charge distribution and molecular polarity of [math] NH_3 [/math]?

- even distribution and polar
- uneven distribution and nonpolar
- uneven distribution and polar
- even distribution and nonpolar

3.

Which phrase correctly describes the distribution of charge and the molecular polarity of ethane?

- symmetrical and polar
- asymmetrical and polar
- asymmetrical and nonpolar
- symmetrical and nonpolar

4.

Which of the following molecular geometries could be nonpolar?

- bent
- tetrahedral
- trigonal pyramidal
- none of the above

5.

Which statement correctly describes NaCl?

- Its charge is distributed evenly
- It is a polar molecule
- It is ionic, and its charges are distributed very unevenly
- It contains polar covalent bonds

6.

Which formula represents a nonpolar molecule?

- [math]HBr[/math]
- [math] H_2S [/math]
- [math] CBr_4 [/math]
- [math] PCl_3 [/math]

7.

Which of the following molecules, based on the elements present, would be the most polar?

- HF
- [math] H_2 [/math]
- HCl
- HBr

8.

Which statement explains why ethene does not dissolve in water?

- Ethene is polar and water is nonpolar
- Ethene is nonpolar and water is nonpolar
- Ethene is polar and water is polar
- Ethene is nonpolar and water is polar

9.

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.

10.

A molecule containing polar covalent bonds is always polar.

- True
- False

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