Question 1

In which of the following does the central atom have 2 pairs of non-bonding electrons?

Accepted Answer

In H₂S, the central atom sulfur has 2 pairs of non-bonding electrons.

Question 2

Which compound is not a constitutional isomer of the others?

Accepted Answer

A

Question 3

Select the least electronegative element from the list below:

Accepted Answer

The least electronegative elements are found towards the bottom left of the periodic table, because they have larger atomic radii and weaker nuclear charges. Among the options listed, potassium (K) is the least electronegative element.

Question 4

Select the most electronegative element from the list below:

Accepted Answer

Electronegativity is a measure of an atom's ability to attract electrons towards itself in a chemical bond. Among the given elements, oxygen (O) is the most electronegative as it has a higher effective nuclear charge due to its greater number of protons in the nucleus, making it more attractive to the shared electrons in a bond.

Question 5

How many sigma 1s-2sp³ bonds are there in ethane?

Accepted Answer

In ethane, there are six sigma bonds formed by overlap of six sp3 hybrid orbitals of carbon with 1s orbitals of six hydrogen atoms. The 1s orbital of each hydrogen atom overlaps with one of the six sp3 hybrid orbitals of carbon. Therefore, there are no 1s-2s, 1s-2p, ^3, bonds in ethane.

Question 6

Which of the following structures represent compounds that are constitutional isomers of each other?

Accepted Answer

The answer of Which of the following structures represent compounds...

Question 7

Which of the following represent pairs of constitutional isomers?

Accepted Answer

The answer of Which of the following represent pairs of...

Question 8

Credit for the first synthesis of an organic compound from an inorganic precursor is usually given to:

Accepted Answer

The first synthesis of an organic compound from an inorganic precursor is usually credited to Friedrich Wohler, who in 1828 successfully synthesized urea from ammonium cyanate.

Question 9

Which of the following is the Lewis structure for CH₃CO₂H?

Accepted Answer

The answer of Which of the following is the Lewis...

Question 10

Consider the following: CH₃CH₂CH=CHCH₂CH₃ CH₃CH₂CH₂CH₂CH=CH₂ I II CH₃CH=CHCH₂CH₂CH₃ CH₂=CHCH₂CH₂CH₂CH₃ III IV Which two structures represent the same compound?

Accepted Answer

The answer of Consider the following: CH₃CH₂CH=CHCH₂CH₃ CH₃CH₂CH₂CH₂CH=CH₂ I II CH₃CH=CHCH₂CH₂CH₃ CH₂=CHCH₂CH₂CH₂CH₃ III IV Which two structures represent...

Question 11

Which of the following is a set of constitutional isomers?

Accepted Answer

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

Question 12

Which compound is not a constitutional isomer of the others?

Accepted Answer

The answer of Which compound is not a constitutional isomer...

Question 13

CH₃CH₂OCH₂CH₃ and CH₃CH₂CH₂CH₂OH are examples of what are now termed:

Accepted Answer

The given examples are different arrangements of the same molecular formula, which defines constitutional isomers. Structural isomers refer to molecules with different connectivity or bonding patterns, resonance structures describe the delocalization of electrons within a molecule, functional isomers differ in their functional groups, and empirical isomers have the same molecular formula but different molecular weights or compositions.

Question 14

Which of the following is the Lewis structure for CH₃CH₂O₂H?

Accepted Answer

The answer of Which of the following is the Lewis...

Question 15

Considering Lewis structures,which of these compounds possesses a single unpaired electron?

Accepted Answer

The Lewis structure for NO has a single unpaired electron on the nitrogen atom. The other compounds listed do not have any unpaired electrons in their Lewis structures.

Question 16

Which of these is a correct electron-dot representation of the nitrite ion,NO₂^-?

Accepted Answer

The answer of Which of these is a correct electron-dot...

Question 17

Which is NOT a correct Lewis structure?

Accepted Answer

The answer of Which is NOT a correct Lewis structure?
...

Question 18

The greatest degree of ionic character is anticipated for the bond between:

Accepted Answer

The greater the difference in electronegativity, the greater the degree of ionic character in a bond. Among the given options, the greatest difference in electronegativity is between H and Cl (3.0 - 2.1 = 0.9), indicating a high degree of ionic character.

Question 19

Which compound is not a constitutional isomer of the others?

Accepted Answer

III has a different number and arrangement of atoms than the others, making it a different compound altogether. It has an extra carbon atom compared to the others, which affects its molecular formula and connectivity. Therefore, it is not a constitutional isomer of the other compounds.

Question 20

Which of the following represent a pair of constitutional isomers?

Accepted Answer

The answer of Which of the following represent a pair...

Quiz 1: Carbon Compounds and Chemical Bonds

In which of the following does the central atom have 2 pairs of non-bonding electrons?

Which compound is not a constitutional isomer of the others?

Select the least electronegative element from the list below:

Select the most electronegative element from the list below:

How many sigma 1s-2sp3 bonds are there in ethane?

Which of the following structures represent compounds that are constitutional isomers of each other?

Which of the following represent pairs of constitutional isomers?

Credit for the first synthesis of an organic compound from an inorganic precursor is usually given to:

Which of the following is the Lewis structure for CH3CO2H?

Consider the following: CH3CH2CH=CHCH2CH3 CH3CH2CH2CH2CH=CH2 I II CH3CH=CHCH2CH2CH3 CH2=CHCH2CH2CH2CH3 III IV Which two structures represent the same compound?

Which of the following is a set of constitutional isomers?

Which compound is not a constitutional isomer of the others?

CH3CH2OCH2CH3 and CH3CH2CH2CH2OH are examples of what are now termed:

Which of the following is the Lewis structure for CH3CH2O2H?

Considering Lewis structures,which of these compounds possesses a single unpaired electron?

Which of these is a correct electron-dot representation of the nitrite ion,NO2-?

Which is NOT a correct Lewis structure?

The greatest degree of ionic character is anticipated for the bond between:

Which compound is not a constitutional isomer of the others?

Which of the following represent a pair of constitutional isomers?

How many sigma 1s-2sp³ bonds are there in ethane?

Which of the following is the Lewis structure for CH₃CO₂H?

Consider the following: CH₃CH₂CH=CHCH₂CH₃ CH₃CH₂CH₂CH₂CH=CH₂ I II CH₃CH=CHCH₂CH₂CH₃ CH₂=CHCH₂CH₂CH₂CH₃ III IV Which two structures represent the same compound?

CH₃CH₂OCH₂CH₃ and CH₃CH₂CH₂CH₂OH are examples of what are now termed:

Which of the following is the Lewis structure for CH₃CH₂O₂H?

Which of these is a correct electron-dot representation of the nitrite ion,NO₂^-?