11. According to VSEPR theory, what is the shape of a molecule with four bonding pairs and no lone pairs? a) Trigonal planar b) Tetrahedral c) Linear d) Bent 12. The molecular geometry of ammonia (NH_(3)) is: a) Trigonal planar b) Trigonal pyramidal c) Tetrahedral d) Linear 13. Which of the following molecules has a bent (V-shaped) molecular geometry? a) CO_(2) b) CH_(4) c) H_(2)O d) BF_(3) 14. What is the bond angle in a molecule with trigonal planar geometry? a) 90^circ b) 109.5^circ c) 120^circ d) 180^circ 15. Which of the following molecules is nonpolar despite having polar bonds? a) H_(2)O b) NH_(3) c) CH_(4) d) CO

11. b) Tetrahedral
Explanation: According to VSEPR theory, a molecule with four bonding pairs and no lone pairs will have a tetrahedral shape.

12. b) Trigonal pyramidal
Explanation: The molecular geometry of ammonia (NH3) is trigonal pyramidal due to the presence of one lone pair on the nitrogen atom.

13. c) H2O
Explanation: Among the given options, only H2O has a bent (V-shaped) molecular geometry.

14. c) 120°
Explanation: In a molecule with trigonal planar geometry, the bond angle is 120°.

15. c) CH4
Explanation: CH4 is nonpolar despite having polar bonds because the molecule has a symmetrical tetrahedral shape, which cancels out the dipole moments of the individual bonds.