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Free Practice Quiz Question List

01 Structure and Bonding in Organic Molecules Online Quiz Questions

Use this free practice quiz with 20 questions to review 01 Structure and Bonding in Organic Molecules, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

In ethene, H2C=CH2, what hybridization and approximate arrangement are expected around each carbon?

  1. A

    sp3 hybridization and tetrahedral arrangement

  2. B

    sp2 hybridization and trigonal planar arrangement

  3. C

    sp hybridization and linear arrangement

02
Choose one
1 point

Carbon dioxide has two polar C=O bonds and a linear shape. Why does the molecule have no net dipole?

  1. A

    The bonds are nonpolar, so there are no bond dipoles to add.

  2. B

    The bond dipoles reinforce because both point toward oxygen.

  3. C

    The polar bond dipoles point in opposite directions and cancel.

03
Choose one
1 point

An electron-pair donor approaches a carbonyl group. Which atom is a common site of attack, and why?

  1. A

    The carbonyl carbon, because it is partially positive.

  2. B

    The carbonyl oxygen, because it is partially negative.

  3. C

    Neither atom, because a polar bond has no partial charges.

04
Choose all
1 point

Select all statements that describe valid resonance forms of a molecule or ion.

  1. A

    The positions of the atoms remain the same.

  2. B

    Only electrons, such as pi electrons or lone pairs, are moved.

  3. C

    The forms represent molecules that switch back and forth at equilibrium.

  4. D

    The total charge must be preserved.

05
Choose all
1 point

Select all statements that correctly describe covalent bonds in the valence-bond model.

  1. A

    A single bond contains one shared electron pair.

  2. B

    A double bond consists of two pi bonds.

  3. C

    A triple bond consists of one sigma bond and two pi bonds.

  4. D

    A pi bond forms through end-to-end orbital overlap.

06
True or false
1 point

True or false: A resonance hybrid is a molecule that rapidly switches back and forth between its resonance forms.

  1. A

    True

  2. B

    False

07
True or false
1 point

True or false: In the valence-bond model, a double bond contains one sigma bond and one pi bond.

  1. A

    True

  2. B

    False

08
Written response
1 point

What term describes an atom's tendency to attract bonding electrons?

09
Written response
1 point

What approximate bond angle, in degrees, is associated with the trigonal planar arrangement around an sp2 carbon?

10
Fill in the blank
1 point

In a skeletal formula, each line end and vertex represents a .

11
Fill in the blank
1 point

In an sp2 carbon, the remaining unhybridized p orbital can form a .

12
Open ended
1 point

The acetate ion has two equivalent resonance drawings, each placing a negative charge on a different oxygen. Explain how these drawings represent the actual ion and why this electron distribution stabilizes it.

13
Choose one
1 point

In ethyne, HC≡CH, what hybridization and approximate arrangement are expected around each carbon?

  1. A

    sp3 hybridization and tetrahedral arrangement

  2. B

    sp hybridization and linear arrangement

  3. C

    sp2 hybridization and trigonal planar arrangement

14
Choose one
1 point

Which molecular representation would be most useful for checking an atom’s lone pairs and formal charge?

  1. A

    A molecular formula

  2. B

    A Lewis structure

  3. C

    A skeletal formula

  4. D

    A three-dimensional drawing

15
Choose one
1 point

In a skeletal formula, what should you infer from an unlabeled vertex in a carbon–carbon line drawing?

  1. A

    Each line end and vertex represents a carbon atom.

  2. B

    Each line end represents a hydrogen atom.

  3. C

    Every carbon-bound hydrogen must be drawn explicitly.

  4. D

    Each vertex represents an oxygen atom.

16
True or false
1 point

True or false: In a three-dimensional molecular drawing, an ordinary line represents a bond lying in the plane of the page.

  1. A

    True

  2. B

    False

17
Choose one
1 point

In the valence-bond model, which combination of bonds makes up a carbon–carbon double bond?

  1. A

    Two sigma bonds and no pi bonds

  2. B

    Two pi bonds and no sigma bonds

  3. C

    One sigma bond and one pi bond

  4. D

    One sigma bond and two pi bonds

18
Choose one
1 point

Carbon dioxide has two polar carbon–oxygen bonds and a linear shape. Why does the molecule have no net dipole?

  1. A

    Its bonds are nonpolar, so no dipoles form.

  2. B

    Its two polar bond dipoles point in opposite directions and cancel.

  3. C

    Its bond dipoles reinforce one another.

  4. D

    Its oxygen atoms carry no partial charges.

19
Written response
1 point

When determining which electrons in an atom participate in bonding, what are the electrons in its outer shell called?

20
Written response
1 point

An atom has three electron-density regions around it. According to the hybridization model, what hybridization is suggested?