Ethanol ($$\text{CH}_3\text{CH}_2\text{OH})$$

Question 1

Which of the following statements best describes the concept of electronegativity?

Accepted Answer

Electronegativity is the intrinsic ability of an atom to attract the shared electrons in a covalent bond.

Question 2

Given the electronegativity values: C = 2.5, O = 3.5, what is the type of bond formed between carbon and oxygen in methanol?

Accepted Answer

Polar covalent bond

Question 3

Which bond has the highest dipole moment according to the provided table of dipole moments?

Accepted Answer

$$	ext{H--F}$$

Question 4

What is the difference in electronegativity between carbon and lithium in methyllithium, and what type of bond does this difference indicate?

Accepted Answer

Difference = 1.5; Polar covalent bond

Question 5

Which molecule below is nonpolar, based on its dipole moment?

Accepted Answer

Carbon dioxide ($$\mu = 0)$$

Question 6

Which of the following bonds would result in carbon having a partial negative charge ($$\delta-$$)?

Accepted Answer

$$	ext{C--Mg}$$

Question 7

A molecule has a symmetrical structure and all its bond polarities and lone-pair contributions cancel out. What is the expected dipole moment?

Accepted Answer

Zero dipole moment

Question 8

Which of the following statements about the inductive effect is correct?

Accepted Answer

The inductive effect is the electron-attracting or electron-withdrawing effect transmitted through $$\sigma$$ bonds.

Question 9

Which functional group is most likely to be soluble in water due to its polarity?

Accepted Answer

Ethanol ($$	ext{CH}_3	ext{CH}_2	ext{OH})$$

Question 10

If the electronegativity difference between two atoms is greater than 2, what type of bond is most likely formed?

Accepted Answer

Ionic bond

Question 11

Which of the following molecules has a net dipole moment of zero?

Accepted Answer

Ethane

Question 12

What is the expected polarity of the bond in $$	ext{H}_3	ext{C}--	ext{F}$$?

Accepted Answer

Carbon is $$\delta+$$, fluorine is $$\delta-$$

Question 13

Which atom is the most electronegative according to the periodic table provided?

Accepted Answer

Fluorine

Question 14

Which of the following bonds is classified as nonpolar covalent based on the electronegativity difference?

Accepted Answer

$$	ext{C--C}$$

Question 15

Which of the following best explains why water has a high dipole moment?

Accepted Answer

Water contains lone pairs on oxygen and highly polar O--H bonds.

Question 16

Which of the following molecules is expected to be insoluble in water?

Accepted Answer

Benzene

Question 17

Which of the following bonds would have the lowest dipole moment?

Accepted Answer

$$	ext{C--C}$$

Question 18

Which of the following is a consequence of the inductive effect in organic molecules?

Accepted Answer

Electronegative elements withdraw electrons through $$\sigma$$ bonds, affecting chemical reactivity.

Question 19

Which of the following molecules has the largest dipole moment according to the provided data?

Accepted Answer

NaCl

Question 20

Which of the following best describes polarizability?

Accepted Answer

Polarizability is the measure of change in electron distribution around the atom to an external electrical influence.

Bonding and Polarity: Electronegativity, Inductive Effect, and Dipole Moments

스터디 가이드 - 연습 문제