General Chemistry 1 Practice Questions (Set 10)

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1) A molecule with a trigonal bipyramidal molecular geometry has a bond angle of
A) <120° for equatorial bonds and <90° for axial bonds.
B) 180°.
C) <90°.
D) 120° for equatorial bonds and 90° for axial bonds.
E) 120°.

2) If an oil tanker leaks oil in the ocean, where does the oil go?
A) The oil floats on the seawater; water is polar and oil is nonpolar.
B) The oil mixes with the water.
C) The oil sinks below the seawater; water is nonpolar and oil is polar.
D) The oil floats on the seawater; water is nonpolar and oil is polar.
E) The oil sinks below the seawater; water is polar and oil is nonpolar.

3) Soap works with water because
A) the polar head and the nonpolar tail attracts water.
B) the polar head attracts the grease and the nonpolar tail attracts water.
C) the polar head attracts water and the nonpolar tail attracts the grease.
D) the polar head and the nonpolar tail attracts the grease.

4) Identify the number of electron groups around a molecule with sp hybridization.
A) 1
B) 2
C) 3
D) 4
E) 5

5) Identify the number of electron groups around a molecule with sp2 hybridization.
A) 1
B) 2
C) 3
D) 4
E) 5

6) Identify the number of electron groups around a molecule with sp3 hybridization.
A) 1
B) 2
C) 3
D) 4
E) 5

7) Select the best Lewis structure for acetone, CH3COCH3.

8) Which of the following compounds contains only one unshared pair of valence electrons?
A) NH3
B) H2O
C) CH4
D) NaCl

9) In the Lewis structure for elemental nitrogen there is (are)
A) a single bond between the nitrogens
B) a double bond between the nitrogens
C) a triple bond between the nitrogens
D) three unpaired electrons
E) none of the above

10) Which of the following does not contain at least one pi bond?
A) H2CO
B) CO2
C) C2H4
D) C2H6
E) All of the above (A-D) contain at least one pi bond.

11) Consider the following Lewis structure:


Which statement about the molecule is false?
A) There are 10 sigma and 2 pi bonds.
B) C-2 is sp2 hybridized with bond angles of 120°.
C) Oxygen is sp3 hybridized.
D) This molecule contains 28 valence electrons.
E) There are some H–C–H bond angles of about 109° in the molecule.

12) Consider the following Lewis structure:


What is the hybridization of the atoms O, C-1, C-2, and C-4?
A) sp3 sp3 sp sp2
B) sp sp3 sp sp
C) sp sp2 sp sp2
D) sp2 sp3 sp2 sp3
E) sp3 sp sp sp2

13) Consider the molecule and the following hybridization choices:

What is the hybridization of the carbon atom that is double-bonded to oxygen?
A) sp
B) sp2
C) sp3
D) dsp3
E) d2sp3

14) What is the hybridization of the carbon atom that is bonded to chlorine?


A) sp
B) sp2
C) sp3
D) dsp3
E) d2sp3

15) What is the hybridization of the nitrogen atom?


A) sp
B) sp2
C) sp3
D) dsp3
E) d2sp3

16) What is the hybridization of the oxygen atom?

A)  sp
B) sp2
C) sp3
D) dsp3
E) d2sp3

17) Complete the Lewis structure for the following molecule:


This molecule has __________ sigma and __________ pi bonds.
A) 4, 5
B) 6, 3
C) 11, 5
D) 13, 2
E) 13, 3

18) Which of the following substances contains two pi bonds?
A) C2H4
B) C3H8
C) C2H2
D) C2H6
E) CH4

19) Describe a pi bond.
A) side by side overlap of p orbitals
B) end to end overlap of p orbitals
C) s orbital overlapping with the end of a p orbital
D) overlap of two s orbitals
E) p orbital overlapping with a d orbital

20) Describe a sigma bond.
A) side by side overlap of p orbitals
B) end to end overlap of s orbitals
C) s orbital overlapping with the side of a p orbital
D) overlap of two f orbitals
E) p orbital overlapping with a d orbital

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