Question 1

Which functional group is NOT present in the following molecule?

$$\mathrm{F{-}C_6H_4{-}CH_2${-}NH{-}CO{-}C_6H_4{-}COOH}$$

Accepted Answer

Ketone

Question 2

Which of the following best describes the hybridization and bond angle around the central carbon atom in methane ($$\mathrm{CH_4$}$$)?

Accepted Answer

$$sp^3$$ hybridization, 109.5° bond angle

Question 3

What is the correct IUPAC name for the following structure?

$$\mathrm{CH_3${-}CH_2${-}CH_2${-}OH}$$

Accepted Answer

Propanol

Question 4

Which molecular orbital results from constructive interference of two 1s atomic orbitals?

Accepted Answer

Sigma bonding ($$\sigma)$$

Question 5

In ethylene ($$\mathrm{C_2H_4}$$), what orbitals form the pi bond between the two carbon atoms?

Accepted Answer

Unhybridized 2p orbitals

Question 6

Which of the following compounds contains a triple bond and what is its hybridization at the triple-bonded carbon?

Accepted Answer

Acetylene ($$\mathrm{C_2H_2}$$), sp

Question 7

What is the correct IUPAC name for a molecule with a six-carbon chain, a triple bond between carbons 2 and 3, and an alcohol group on carbon 5?

Accepted Answer

Hex-2-yn-5-ol

Question 8

Which statement about bond length and bond type in carbon-carbon bonds is correct?

Accepted Answer

A C–C double bond is shorter than a C–C single bond.

Question 9

Which of the following best describes the electronic geometry and molecular geometry of ammonia ($$\mathrm{NH_3$}$$)?

Accepted Answer

Electronic: tetrahedral; Molecular: trigonal pyramidal

Question 10

A molecule has the formula $$\mathrm{CH_3CH_2CH_2CHO}. $$What is the functional group present and its suffix in IUPAC nomenclature?

Accepted Answer

Aldehyde, -al

Question 11

Which of the following is the correct IUPAC name for the compound with the structure $$\mathrm{CH_3${-}CO{-}CH_2${-}CH_3$}$$?

Accepted Answer

Butanone

Question 12

Which of the following statements about $$sp^2$$ hybridization is TRUE?

Accepted Answer

$$sp^2$$ hybridization involves mixing one s and two p orbitals

Question 13

In the context of molecular orbital theory, what is the result of destructive interference between two atomic orbitals?

Accepted Answer

Formation of an antibonding molecular orbital

Question 14

Which of the following molecules has a trigonal planar molecular geometry?

Accepted Answer

Ethylene ($$\mathrm{C_2H_4})$$

Question 15

A molecule contains a carbon atom with two regions of electron density. What is the predicted bond angle and hybridization for this carbon?

Accepted Answer

180°, sp

Question 16

Which of the following is the correct IUPAC name for $$\mathrm{CH_3${-}CH_2${-}NH_2$}$$?

Accepted Answer

Ethanamine

Question 17

Which of the following statements about the geometry of water ($$\mathrm{H_2O}) is $$correct?

Accepted Answer

Water has a bent molecular geometry with a bond angle less than 109.5°.

Question 18

Which of the following is the correct order of bond lengths for carbon-carbon bonds from longest to shortest?

Accepted Answer

$$\mathrm{C{-}C} \u003e \mathrm{C{=}C} \u003e \mathrm{C{\equiv}C}$$

Question 19

Which of the following is a correct example of a secondary alcohol?

Accepted Answer

$$\mathrm{CH_3${-}CH(OH){-}CH_3$}$$

Organic Chemistry: Functional Groups and IUPAC Nomenclature

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