Question 1

Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethene, H₂C=CH₂?

Accepted Answer

In ethene, carbon is sp2 hybridized, so the C-H bonds are formed by the overlap of C2sp2 orbitals with H1s orbitals.

Question 2

Which of the circled bonds is the strongest?

Accepted Answer

Bond 1 is a triple bond, which is the strongest type of covalent bond.

Question 3

Which of the following shows curved arrows that correctly accounts for the differences between the two structures?

Accepted Answer

The answer of Which of the following shows curved arrows...

Question 4

Which of the following is a tertiary (3$\degree$) alcohol?

Accepted Answer

A tertiary alcohol is defined as one in which the carbon atom that carries the hydroxyl group (OH) is bonded to three other carbon atoms. In the given molecular formula, only option C has three carbon atoms bonded to the carbon atom with the hydroxyl group, making it a tertiary alcohol.

Question 5

Draw bond-line structures of all of the alkanes that have the formula C₅H₁₂.

Accepted Answer

The answer of Draw bond-line structures of all of the...

Question 6

Which atomic orbitals overlap to form the carbon-carbon s and p bonding molecular orbitals of ethene, H₂C=CH₂?

Accepted Answer

The carbon-carbon sigma bond is formed by the overlap of C2sp² atomic orbitals. The two pi bonds are formed by the overlap of the C2p orbitals of each carbon atom.

Question 7

Which of the following resonance structures makes the largest contribution to the structure of [H₂CCHO]^-?

Accepted Answer

The double bond between the carbon and oxygen atoms can contribute to resonance, leading to two possible resonance structures. However, in structure 1, the negative charge is on an oxygen atom, which is a more electronegative atom than the carbon atom, meaning the charge is less stable. Structure 2 has the negative charge on a more stable carbon atom. Therefore, structure 2 makes the largest contribution to the overall structure of the molecule.

Question 8

Which of the following is a primary (1$\degree$) alcohol?

Accepted Answer

The answer of Which of the following is a primary...

Question 9

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HCºCH). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Accepted Answer

The answer of Provide a neatly drawn figure to show...

Question 10

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ammonia (NH₃) and which contain the lone pair of electons. Label each orbital with its hybridization.

Accepted Answer

The answer of Provide a neatly drawn figure to show...

Question 11

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H₂O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Accepted Answer

The answer of Provide a neatly drawn figure to show...

Question 12

Which of the following statements is not true?

Accepted Answer

The strength of a bond is determined by the amount of energy required to break it. The sp³C-H bond of an alkane is actually stronger than the spC-H bond of an alkyne because it has more s-character, meaning the electron density is closer to the nucleus of the carbon atom, making it harder to break. Additionally, the carbon-carbon triple bond of an alkene is not exactly three times as strong as a carbon-carbon single bond of an alkane because bond strength is not always directly proportional to the number of bonds.

Question 13

Which of the following is/are tetrahedral?

Accepted Answer

The answer of Which of the following is/are tetrahedral? 
...

Question 14

What is the approximate strength of the C-C bond of ethane?

Accepted Answer

The approximate strength of the C−C bond in ethane is around 376 kJ/mol (90 kcal/mol). This value is a standard reference for a single carbon-carbon bond strength in alkanes.

Question 15

Which of the following is a primary (1$\degree$) amine?

Accepted Answer

The answer of Which of the following is a primary...

Question 16

Which of the following is an ester?

Accepted Answer

The answer of Which of the following is an ester?...

Question 17

Which of the following is a secondary (2$\degree$) amine?

Accepted Answer

The answer of Which of the following is a secondary...

Question 18

Which atomic orbitals overlap to form the carbon-carbon s molecular bonding orbital of ethyne, HCºCH?

Accepted Answer

The carbon-carbon single bond in ethyne comes from the overlapping of two C2sp hybrid orbitals, one from each carbon atom, resulting in the formation of a sigma bond.

Question 19

Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethyne, HCºCH?

Accepted Answer

In ethyne, each carbon atom forms two sp hybrid orbitals, which overlap with the 1s orbital of the two hydrogen atoms to form four sigma (s) bonds. Therefore, the atomic orbitals that overlap to form the carbon-hydrogen s bonding molecular orbitals are C2sp + H1s.

Question 20

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H₂C=CH₂). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Accepted Answer

The answer of Provide a neatly drawn figure to show...

Quiz 1: Covalent Bonding and Shapes of Molecules

Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethene, H₂C=CH₂?

Which of the circled bonds is the strongest?

Which of the following shows curved arrows that correctly accounts for the differences between the two structures?

Which of the following is a tertiary (3 $\degree$ ) alcohol? $Which of the following is a tertiary (3 \degree ) alcohol? A) 1 B) 2 C) 3 D) 4$

Draw bond-line structures of all of the alkanes that have the formula C₅H₁₂.

Which atomic orbitals overlap to form the carbon-carbon s and p bonding molecular orbitals of ethene, H₂C=CH₂?

Which of the following resonance structures makes the largest contribution to the structure of [H₂CCHO]^-?

Which of the following is a primary (1 $\degree$ ) alcohol? $Which of the following is a primary (1 \degree ) alcohol? A) 1 B) 2 C) 3 D) 4$

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HCºCH). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ammonia (NH₃) and which contain the lone pair of electons. Label each orbital with its hybridization.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H₂O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Which of the following statements is not true?

Which of the following is/are tetrahedral?

What is the approximate strength of the C-C bond of ethane?

Which of the following is a primary (1 $\degree$ ) amine? $Which of the following is a primary (1 \degree ) amine? A) 1 B) 2 C) 3 D) 4$

Which of the following is an ester?

Which of the following is a secondary (2 $\degree$ ) amine? $Which of the following is a secondary (2 \degree ) amine? A) 1 B) 2 C) 3 D) 4$

Which atomic orbitals overlap to form the carbon-carbon s molecular bonding orbital of ethyne, HCºCH?

Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethyne, HCºCH?

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H₂C=CH₂). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Quiz 1: Covalent Bonding and Shapes of Molecules

Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethene, H2C=CH2?

Which of the circled bonds is the strongest?

Which of the following shows curved arrows that correctly accounts for the differences between the two structures?

Which of the following is a tertiary (3 °\degree° ) alcohol?

Draw bond-line structures of all of the alkanes that have the formula C5H12.

Which atomic orbitals overlap to form the carbon-carbon s and p bonding molecular orbitals of ethene, H2C=CH2?

Which of the following resonance structures makes the largest contribution to the structure of [H2CCHO] -?

Which of the following is a primary (1 °\degree° ) alcohol?

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HCºCH). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ammonia (NH3) and which contain the lone pair of electons. Label each orbital with its hybridization.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H2O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Which of the following statements is not true?

Which of the following is/are tetrahedral?

What is the approximate strength of the C-C bond of ethane?

Which of the following is a primary (1 °\degree° ) amine?

Which of the following is an ester?

Which of the following is a secondary (2 °\degree° ) amine?

Which atomic orbitals overlap to form the carbon-carbon s molecular bonding orbital of ethyne, HCºCH?

Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethyne, HCºCH?

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H2C=CH2). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethene, H₂C=CH₂?

Which of the following is a tertiary (3 $\degree$ ) alcohol? $Which of the following is a tertiary (3 \degree ) alcohol? A) 1 B) 2 C) 3 D) 4$

Draw bond-line structures of all of the alkanes that have the formula C₅H₁₂.

Which atomic orbitals overlap to form the carbon-carbon s and p bonding molecular orbitals of ethene, H₂C=CH₂?

Which of the following resonance structures makes the largest contribution to the structure of [H₂CCHO]^-?

Which of the following is a primary (1 $\degree$ ) alcohol? $Which of the following is a primary (1 \degree ) alcohol? A) 1 B) 2 C) 3 D) 4$

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HCºCH). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ammonia (NH₃) and which contain the lone pair of electons. Label each orbital with its hybridization.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H₂O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Which of the following is a primary (1 $\degree$ ) amine? $Which of the following is a primary (1 \degree ) amine? A) 1 B) 2 C) 3 D) 4$

Which of the following is a secondary (2 $\degree$ ) amine? $Which of the following is a secondary (2 \degree ) amine? A) 1 B) 2 C) 3 D) 4$

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H₂C=CH₂). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).