Module 4-6 and 12

Question 1

It is a symbol in which electrons in the valence shell of an atom are represented by dots

Answer 1

Lewis Symbol

Question 2

is a graphic representation of the electron distribution in a
compound or an ion.

Answer 2

Lewis Structure

Question 3

• For ________, increase the number of available electrons by the charge of anion;
• For ________, decrease the number of available electrons by the charge of the cation.

Answer 3

• an anion
• a cation

Question 4

ANION =
CATION =

Answer 4

ANION = NEGATIVE
CATION = POSITIVE

Question 5

Formula of formal charge?

Answer 5

(no. of bonded electrons + no. of non-bonded electrons) or (no. of lines + no. of dots)

Question 6

states that a molecule will adjust its shape so that the valence electron pairs (these can either be a bonding pair or a lone pair) stay as far apart from each other as possible.

Answer 6

VSEPR model

Question 7

• molecule is not symmetric.
• it has a net dipole moment

Answer 7

Polar

Question 8

• molecule is completely symmetric
• have no net dipole moment

Answer 8

Nonpolar

Question 9

is a part of a larger molecule and is composed of an atom or group of atoms that have characteristic chemical behavior of an organic compound.

Answer 9

functional group

Question 10

Melting and Boiling point of Butane

Answer 10

-138.4, -0.5

Question 11

Melting and Boiling point of 1-butanol

Answer 11

-89.5, 117.2

Question 12

Melting and Boiling point of Butanoic acid

Answer 12

-4.5, 163.5

Question 13

Alcohol

General Formula

Answer 13

ROH

Question 14

Aldehyde

General Formula

Answer 14

RCHO

Question 15

Ketone

General Formula

Answer 15

RCOR’

Question 16

Carboxylic Acid

General Formula

Answer 16

RCOOH

Question 17

Ester

General Formula

Answer 17

RCOOR’

Question 18

Amide

General Formula

Answer 18

RCONR’R”

Question 19

Amine

General Formula

Answer 19

RNR’R”

Question 20

• an organic compound that contains
• one or more hydroxyl groups.

Answer 20

Alcohol

Question 21

They are polar in nature. Their boiling point is lower than alcohol because of lack of hydrogen, thus they cannot participate in hydrogen bonding like alcohols.

Answer 21

Aldehydes and Ketones

Question 22

• is an organic compound which can donate the proton of the hydroxyl group to a number of reactions.
• Its acidity is the primary chemical characteristic

Answer 22

Carboxylic Acid

Question 23

The molecules are polar in nature but have no hydrogen atom attached directly to an oxygen atom. The boiling point are similar to aldehyde and ketones.

Answer 23

Esters

Question 24

functional groups in which a carbonyl carbon atom is linked by a single bond to a nitrogen atom and either a hydrogen or a carbon atom.
* also known as a carboxamide

Answer 24

Amides

Question 25

• They can be aliphatic or aromatic.
• The vapors are flammable.
• They are colorless in the pure state and have a fishy odor.

Answer 25

Amines