Choose the correct answer for each question.

1. In which one of the following pairs have the compounds the same type of bonding and shape?
   

   1.   ?    BF3 and NH3
   2.   ?    CH4 and SiCl4
   3.   ?    HCl and H2O
   4.   ?    CO2 and SiO2

2. Which one of the following is the correct description of the shape of the NH3 molecule?
   

   1.   ?    trigonal planar
   2.   ?    tetrahedral
   3.   ?    square planar
   4.   ?    pyramidal

3. Which one of the following pairs of molecules has similar bond angles?
   

   1.   ?    C2H4 and BF3
   2.   ?    H2O and CO2
   3.   ?    BeCl2 and CH4
   4.   ?    SF6 and C2H6

4. In which one of the following pairs do both compounds contain tetrahedral bond angles between atoms?
   

   1.   ?    BeCl2 and BCl3
   2.   ?    CCl4 and CH4
   3.   ?    SF6 and H2S
   4.   ?    NH3 and H2O

5. The shape of boron trichloride, BCl3, is
   

   1.   ?    equilateral triangle
   2.   ?    pyramidal
   3.   ?    spherical
   4.   ?    tetrahedral
   5.   ?    T-shaped

6. Which one of the following molecules is linear?
   

   1.   ?    CO2
   2.   ?    H2O
   3.   ?    CH3CH2CH3
   4.   ?    H2S
   5.   ?    H2O2

7. Which one of the following has a bond angle of 109.5o?
   

   1.   ?    BeCl2
   2.   ?    BF3
   3.   ?    CH4
   4.   ?    CO2

8. What is the shape of a water molecule?
   

   1.   ?    bent
   2.   ?    linear
   3.   ?    pyramidal
   4.   ?    tetrahedral

9. Which of the following best describes the shape of the carbon dioxide molecule?
   

   1.   ?    linear
   2.   ?    tetrahedral
   3.   ?    octahedral
   4.   ?    planar

10. Which of the following best describes the shape of the sulphur hexafluoride molecule?
    

    1.   ?    linear
    2.   ?    tetrahedral
    3.   ?    octahedral
    4.   ?    planar