Introductions

Question 1

Chemistry of compounds present in LIVING ORGANISM

Answer 1

Organic Chemistry

Question 2

They all contain carbon

Answer 2

Organic Chemistry

Question 3

Organic chemistry is also known as the

Answer 3

Chemistry of Carbon

Question 4

Natural Sources of Organic Compounds

Living Things ->?

Answer 4

Carbohydrates /
Proteins / Fats /
Vitamins /
Antibiotics

Question 5

A variety of organic products obtained from

Answer 5

Living Things

Question 6

Natural Sources of Organic Compounds

Crude Oil or Coal

Answer 6

Alkanes / Alkenes /
Alkynes / Aromatic
hydrocarbons

Question 7

Obtained from living organism

Answer 7

Organic Compounds

Question 8

Obtained from non-living sources

Answer 8

Inorganic Compounds

Question 9

Who was the german chemist who made an inorganic compounds (ammonium cyanate) form into a organic compounds (Urea)?

Answer 9

1828 Wohler

Question 10

What are the exceptions of carbon compounds

Answer 10

CO
CO2
Carbonates
Hydrogencarbonates
Carbides
Cyanides

Question 11

Enumerate the Unique Nature of Carbon

Answer 11

1. Ability to Form Four Strong Covalent Bonds
2. Ability to Catenate
3. Ability to form multiple bonds

Question 12

is the ability of atoms in forming stable bonds with itself, hence joining up into chains or rings.

Answer 12

Catenation

Question 13

is defined as an atom or group of atoms that effectively determines the chemical properties of an organic compound

Answer 13

Functional Group

Question 14

Propane does not react with ______

Answer 14

Sodium

Question 15

_________ and _________ react with sodium to give hydrogen gas.

Answer 15

Ethanol and propan-1-ol

Question 16

is a series of compounds that have the same functional group, and each member differs from the next member by a CH2 unit in their formulae

Answer 16

Homologous Series

Question 17

Members in the same series can be represented by a ______________

Answer 17

General Formula

Question 18

Formula of Alkanes

Answer 18

CnH2n+2

Question 19

Formula of Alkenes

Answer 19

CnH2n

Question 20

Formula for Alkynes

Answer 20

CnH2n-2

Question 21

Members of a homologous series have ______ chemical properties

Answer 21

Similar

Question 22

The physical properties change ________ along the homologous series

Answer 22

Gradually

Question 23

The longer the carbon chain in the molecule

Answer 23

The greater the attractive force between molecules

The higher the melting point, boiling point and density

Question 24

MAIN FACTORS AFFECTING THE PHYSICAL PROPERTIES OF ORGANIC COMPOUNDS

Answer 24

1. Structure of the Functional Group
2. Length of Carbon Chains

Question 25

Structure of Functional Group Molecules having a_____ functional group have a ______ ______ _______ than others with a non- polar functional group of similar molecular masses

Answer 25

Polar and Higher boiling points

Question 26

Polar

Answer 26

Goes into different directions in their polarity

Question 27

Non polar

Answer 27

Goes into one single direction, that cancels out one another

Question 28

Solubility depends on the ______ of organic molecules and the solvent.

Answer 28

Polarity

Question 29

_______ compounds dissolve readily in non-polar or weakly polar solvents.

Answer 29

Non-polar or weakly polar

Question 30

_______ compounds dissolve readily in highly polar solvents.

Answer 30

Highly polar

Question 31

Solubility in Organic Molecules

Answer 31

Like dissolve like

Question 32

Why does Hexane Dissolve Readily in Tetrachloromethane?

Answer 32

Intermolecular forces among hexane molecules and those among tetrachloromethane molecules

Question 33

Why is Hexane Insoluble in Water?

Answer 33

Weak intermolecular force between hexane and water molecules

Question 34

Molecules having ⎯OH or ⎯ NH2 groups are able to form ________ _______

Answer 34

Hydrogen Bonds

Question 35

Hydrogen bonds affect the physical properties of alcohols and amines with _______ _______ ______

Answer 35

low molecular masses

Question 36

Why does Propan-1-ol have a Higher Boiling Point?

Answer 36

Because of its hydrogen bond

Question 37

Formation of Hydrogen Bonds

Answer 37

* Also affect the solubility of a molecule * Molecules with ⎯OH groups are able to form hydrogen bonds with surrounding water molecules

Question 38

Molecules with ________ __________ masses have higher melting point, boiling point and density.

Answer 38

Higher molecular

Question 39

Higher molecular masses

Answer 39

➔ Large molecular sizes ➔ Stronger London dispersion forces among molecules

Question 40

boiling point and density are lower compared to its straight-chain isomer

Answer 40

Molecules with branched chains

Question 41

Straight-chain isomers have greater ______ _____in contact with each other

Answer 41

Surface Area

Question 42

Greater attractive force among the molecules

Answer 42

Straight-Chain Isomers

Question 43

melting point is higher compared to its straight-chain isomer

Answer 43

Molecules with branched chains

Question 44

Branched-chain isomers are more ______

Answer 44

Spherical

Question 45

Branched-chain isomers

Answer 45

➔ Packed more efficiently in solid state ➔ Extra energy is needed to break down the efficient packing