Kristen Wislowski
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Some practice questions from the chapter 9 homework problems

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Kristen Wislowski
Created by Kristen Wislowski over 4 years ago
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Chapter 9 Quiz

Chapter 9 Quiz

Question 1 of 6

1

Are the O-N-O bond angles greater in the nitrite (NO2-) ion or nitrate ion (NO3-)?

Select one of the following:

  • Nitrate has the greater bond angle because double bonds take up more space than single bonds

  • Nitrate has the greater bond angle because nitrite's lone pairs take up more space than bonds

  • Nitrite has the greater bond angle because a trigonal planar bond angle is greater than a tetrahedral bond angle

  • Nitrite has the greater bond angle because a linear bond angle is greater than a trigonal planar bond angle

Explanation

Question 2 of 6

❌ -
3

The following molecules contain polar covalent bonds. Which are overall nonpolar molecules?

Select one or more of the following:

  • CO2

  • H2O

  • CHCl3

  • CCl4

  • BH3

Explanation

Question 3 of 6

1

Does COS have a dipole moment? Choose the answer that best explains the reason for your choice

Select one of the following:

  • COS has a dipole moment because it is asymmetric and the dipole moments do not completely cancel

  • COS has no dipole moment because the molecule is linear and dipole moments cancel in linear molecules

  • COS has no dipole moment because it is bent and the dipole moments cancel

  • COS has a dipole moment because the molecule is bent and the dipole moments combine

Explanation

Question 4 of 6

❌ -
2

Which molecule is more polar in each pair?
Pair #1: NH3 or PH3
Pair #2: CCl2F2 or CBr2F2

Select one or more of the following:

  • Pair #1: NH3 is more polar than PH3

  • Pair #1: PH3 is more polar than NH3

  • Pair #2: CCl2F2 is more polar than CBr2F2

  • Pair #2: CBr2F2 is more polar then CCl2F2

Explanation

Question 5 of 6

1

Which of the following is NOT a potential consequence of molecular shape?

Select one of the following:

  • Chemical reactivity

  • Physical properties

  • Chemical composition

  • Molecular recognition

Explanation

Question 6 of 6

1

An atom in a molecule has a steric number of 4. The atom also has one lone pair of electrons. What is the molecular geometry around this atom?

Select one of the following:

  • Trigonal pyramidal

  • Tetrahedral

  • Bent

  • Trigonal planar

Explanation

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