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1. Which of the following has square-planar molecular geometry?

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a. SF4

b. XeF4

c. CCl2Br2

d. CCl4

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e. PH3

2. Which of the following has a T-shaped structure?

a. NH3

b. BCl3

c. ICl3

d.

PCl3

e. SO3

3. Which series correctly identifies the hybridization of the central atom in a molecule of AlCl3?

a. sp

b. sp2

c. sp3

d. sp3d

e. sp

3d2

4. The angle between two sp hybrid orbitals is:

a. 109°

b. 120°

c. 180°

d. 60°

e. 90°

5. The fact that the BF3 molecule is planar means that the B atom is:

a. unhybridized

b. sp-hybridized

c. sp3-hybridized

d. sp2-hybridized

6. What type of hybrid orbitals are used by the carbon atoms in C2H6?

a. d2sp3

b. sp3

c. sp2

d. d2sp2

e. sp

7. How many valence electrons does an aluminum atom have?

8. Consider a molecule of NI3.

a. How many bonding electron pairs are there?

b. In NI3, how many lone electron pairs are there?

9. Using VSEPR, predict the shape of the following molecules:

Molecule

Shape

carbon tetrachloride

methane

SeH2

TeF6

MgCl2

AlBr3

IF5

TeCl2

BrF3

PCl3

10. Why don’t all molecules with the general atomic formula AB3 have the same shape?

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