Question 1

Overlap of the two atomic orbitals as shown could result in the formation of a $\pi$ bond.

Accepted Answer

The overlapping of two p-orbitals in a perpendicular fashion can result in the formation of a pi bond.

Question 2

Which of the following is an carboxylic ester? 
A)1
B)2
C)3
D)4

Accepted Answer

The answer of Which of the following is an carboxylic...

Question 3

Which of the following resonance structures makes the largest contribution to the structure of [H₂CCHO]^-? A)1 B)2 C)3 D)4

Accepted Answer

The answer of Which of the following resonance structures makes...

Question 4

What is the approximate strength of the C-C bond of ethane?
A)376 kJ/mol (90 kcal./mol)
B)422 kJ/mol (101 kcal./mol)
C)556 kJ/mol (133 kcal./mol)
D)727 kJ/mol (174 kcal./mol)

Accepted Answer

The C-C bond in ethane is a single bond, and its bond strength is approximately 376 kJ/mol (90 kcal/mol).

Question 5

Which of the following shows curved arrows that correctly accounts for the differences between the two structures? 
A)1
B)2
C)3
D)4

Accepted Answer

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

Question 6

Which of the following statements is not true? A)The sp³C-H bond of an alkane is weaker than the spC-H bond of an alkyne. B)The carbon-carbon triple bond of an alkyne is shorter than the carbon-carbon bond of alkenes. C)The carbon-carbon triple bond of an alkene is exactly three times as strong as a carbon-carbon single bond of an alkane. D)The sp³C-H bond of an alkane is longer than the spC-H bond of an alkyne.

Accepted Answer

The statement "The carbon-carbon triple bond of an alkene is exactly three times as strong as a carbon-carbon single bond of an alkane" is not true. In fact, the carbon-carbon triple bond of an alkyne is exactly three times as strong as a carbon-carbon single bond of an alkane.

Question 7

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

Accepted Answer

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

Question 8

The following two structural formulas represent isomers.

Accepted Answer

The answer of The following two structural formulas represent isomers....

Question 9

Which atomic orbitals overlap to form the carbon-carbon $\sigma$ molecular bonding orbital of ethyne, HC$\equiv$CH? A)C2p + C2p B)C2sp + C2sp C)C2sp² + C2sp² D)C2sp³ + C2sp³

Accepted Answer

The carbon-carbon sigma bond in ethyne is formed by overlap of two carbon sp orbitals, specifically the C2sp orbitals.

Question 10

Which atomic orbitals overlap to form the carbon-carbon $\sigma$and $\pi$bonding molecular orbitals of ethene, H₂C=CH₂? A)C2sp³ + C2sp³, and C2p + C2p B)C2sp² + C2sp², and C2sp² + C2sp² C)C2sp² + C2sp², and C2p + C2p D)C2sp³ + C2sp³, and C2sp² + C2sp²

Accepted Answer

The carbon-carbon $\sigma$ bond is formed by the overlap of two sp² hybrid orbitals, one from each carbon atom. The carbon-carbon $\pi$ bond is formed by the overlap of two p orbitals, one from each carbon atom.

Question 11

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

Accepted Answer

A primary amine has one alkyl or aryl group attached to the nitrogen atom. In choice C, the nitrogen atom has only one alkyl group (methyl group) attached to it, making it a primary amine. Choices A, B, and D have two alkyl groups attached to the nitrogen atom, making them secondary amines.

Question 12

Which atomic orbitals overlap to form the carbon-hydrogen $\sigma$ bonding molecular orbitals of ethyne, HC$\equiv$CH? A)C2p + H1s B)C2sp + H1s C)C2sp² + H1s D)C2sp³ + H1s

Accepted Answer

In ethyne, the carbon atoms use sp hybrid orbitals to form the triple bond. This leaves the unhybridized p orbitals available to form pi bonds with other atoms. However, the sigma bond between the carbon and hydrogen atoms is formed by the overlap of the carbon sp orbital with the hydrogen 1s orbital. Therefore, choice B is the correct option.

Question 13

Consider the following molecular model.  The condensed structural formula would be

Accepted Answer

The answer of Consider the following molecular model.  The...

Question 14

Which atomic orbitals overlap to form the carbon-hydrogen $\sigma$bonding molecular orbitals of ethene, H₂C=CH₂? A)C2p + H1s B)C2sp + H1s C)C2sp² + H1s D)C2sp³ + H1s

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

Which of the circled bonds is the strongest? 
A)1
B)2
C)3
D)4

Accepted Answer

Bond 1 is a carbon-carbon triple bond, which is the strongest bond among the options shown in the image. Triple bonds involve the sharing of three pairs of electrons, which makes the bond stronger than double or single bonds.

Question 17

The hybridization on the numbered carbon atoms in the following compound would be Carbon 1 sp³ and Carbon 2 sp².

Accepted Answer

The answer of The hybridization on the numbered carbon atoms...

Question 18

Which of the following is/are tetrahedral? 1)methane, CH₄ 2)methyl carbocation, CH₃⁺ 3)methyl carbanion, CH₃^- 4)methyl radical, CH₃^- A)only 1 and 2 B)only 1 and 3 C)only 1 and 4 D)only 2 and 3

Accepted Answer

Methane (CH₄) is tetrahedral. Methyl carbanion (CH₃⁻) also has a tetrahedral geometry due to the presence of a lone pair on the carbon, making it sp³ hybridized. Methyl carbocation (CH₃⁺) and methyl radical (CH₃•) are not tetrahedral; they are planar and have sp² hybridization.

Question 19

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

Accepted Answer

Tertiary alcohols have three carbon atoms bonded to the carbon atom bearing the hydroxyl group (-OH). In the given structure, only the third carbon atom from the left is bonded to three other carbon atoms, making it a tertiary alcohol. Therefore, the answer is Choice C.

Question 20

Consider the following structural formula.  The following is a resonance structure.

Accepted Answer

The answer of Consider the following structural formula.  The...

Quiz 1: Covalent Bonding and Shapes of Molecules

Overlap of the two atomic orbitals as shown could result in the formation of a $\pi$ bond. $Overlap of the two atomic orbitals as shown could result in the formation of a \pi bond.$ $Overlap of the two atomic orbitals as shown could result in the formation of a \pi bond.$

Which of the following is an carboxylic ester?

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

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

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

Which of the following statements is not true?

Which of the following is a secondary (2^$\circ$) amine? $Which of the following is a secondary (2<sup> \circ </sup>) amine? A) 1 B) 2 C) 3 D) 4$

The following two structural formulas represent isomers.

Which atomic orbitals overlap to form the carbon-carbon $\sigma$ molecular bonding orbital of ethyne, HC $\equiv$ CH?

Which atomic orbitals overlap to form the carbon-carbon $\sigma$ and $\pi$ bonding molecular orbitals of ethene, H₂C=CH₂?

Which of the following is a primary (1^$\circ$) amine? $Which of the following is a primary (1<sup> \circ </sup>) amine? A) 1 B) 2 C) 3 D) 4$

Which atomic orbitals overlap to form the carbon-hydrogen $\sigma$ bonding molecular orbitals of ethyne, HC $\equiv$ CH?

Consider the following molecular model. The condensed structural formula would be

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

Which of the following is a primary (1^$\circ$) alcohol? $Which of the following is a primary (1<sup> \circ </sup>) alcohol? A) 1 B) 2 C) 3 D) 4$

Which of the circled bonds is the strongest?

The hybridization on the numbered carbon atoms in the following compound would be Carbon 1 sp³ and Carbon 2 sp².

Which of the following is/are tetrahedral? 1) methane, CH₄ 2) methyl carbocation, CH₃⁺ 3) methyl carbanion, CH₃^- 4) methyl radical, CH₃^-

Which of the following is a tertiary (3^$\circ$) alcohol? $Which of the following is a tertiary (3<sup> \circ </sup>) alcohol? A) 1 B) 2 C) 3 D) 4$

Consider the following structural formula. The following is a resonance structure.

Quiz 1: Covalent Bonding and Shapes of Molecules

Overlap of the two atomic orbitals as shown could result in the formation of a π\piπ bond.

Which of the following is an carboxylic ester?

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

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

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

Which of the following statements is not true?

Which of the following is a secondary (2 ∘\circ∘ ) amine?

The following two structural formulas represent isomers.

Which atomic orbitals overlap to form the carbon-carbon σ\sigmaσ molecular bonding orbital of ethyne, HC ≡\equiv≡ CH?

Which atomic orbitals overlap to form the carbon-carbon σ\sigmaσ and π\piπ bonding molecular orbitals of ethene, H2C=CH2?

Which of the following is a primary (1 ∘\circ∘ ) amine?

Which atomic orbitals overlap to form the carbon-hydrogen σ\sigmaσ bonding molecular orbitals of ethyne, HC ≡\equiv≡ CH?

Consider the following molecular model. The condensed structural formula would be

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

Which of the following is a primary (1 ∘\circ∘ ) alcohol?

Which of the circled bonds is the strongest?

The hybridization on the numbered carbon atoms in the following compound would be Carbon 1 sp3 and Carbon 2 sp2.

Which of the following is/are tetrahedral? 1) methane, CH4 2) methyl carbocation, CH3+ 3) methyl carbanion, CH3- 4) methyl radical, CH3-

Which of the following is a tertiary (3 ∘\circ∘ ) alcohol?

Consider the following structural formula. The following is a resonance structure.

Overlap of the two atomic orbitals as shown could result in the formation of a $\pi$ bond. $Overlap of the two atomic orbitals as shown could result in the formation of a \pi bond.$ $Overlap of the two atomic orbitals as shown could result in the formation of a \pi bond.$

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

Which of the following is a secondary (2^$\circ$) amine? $Which of the following is a secondary (2<sup> \circ </sup>) amine? A) 1 B) 2 C) 3 D) 4$

Which atomic orbitals overlap to form the carbon-carbon $\sigma$ molecular bonding orbital of ethyne, HC $\equiv$ CH?

Which atomic orbitals overlap to form the carbon-carbon $\sigma$ and $\pi$ bonding molecular orbitals of ethene, H₂C=CH₂?

Which of the following is a primary (1^$\circ$) amine? $Which of the following is a primary (1<sup> \circ </sup>) amine? A) 1 B) 2 C) 3 D) 4$

Which atomic orbitals overlap to form the carbon-hydrogen $\sigma$ bonding molecular orbitals of ethyne, HC $\equiv$ CH?

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

Which of the following is a primary (1^$\circ$) alcohol? $Which of the following is a primary (1<sup> \circ </sup>) alcohol? A) 1 B) 2 C) 3 D) 4$

The hybridization on the numbered carbon atoms in the following compound would be Carbon 1 sp³ and Carbon 2 sp².

Which of the following is/are tetrahedral? 1) methane, CH₄ 2) methyl carbocation, CH₃⁺ 3) methyl carbanion, CH₃^- 4) methyl radical, CH₃^-

Which of the following is a tertiary (3^$\circ$) alcohol? $Which of the following is a tertiary (3<sup> \circ </sup>) alcohol? A) 1 B) 2 C) 3 D) 4$