Hydrocarbons

Question 1

What are hydrocarbons?

Answer 1

Organic molecules made up of carbon and hydrogen.

Question 2

If hydrocarbons only have single bonds how are they called?

Answer 2

Alkanes.

Question 3

How are they called if they have only double bonds?

Answer 3

Alkenes.

Question 4

If they have triple bonds?

Answer 4

Alkynes.

Question 5

Which are the type of formulas?

Answer 5

Full Structural, Condensed, Skeletal and Molecular.

Question 6

Full structural

Answer 6

Every single bond is represented.

Question 7

Condensed

Answer 7

Shows how many hydrogens each carbon has.

Question 8

Can the condensed formula be abbreviated?

Answer 8

Yes.

Question 9

Skeletal

Answer 9

Simplest representation in which every carbon is an end with its corresponding hydrogens.

Question 10

Molecular

Answer 10

Traditional way, not reccomended due to isomers.

Question 11

What are Isomers?

Answer 11

Two or more different molecules made up of the same elements in the same proportions.

Question 12

How can carbons be classified?

Answer 12

Based on how many other carbons are bonded to it.

Question 13

Primary carbon

Answer 13

Bonded to one.

Question 14

Secondary Carbon

Answer 14

Bonded to two.

Question 15

Tertiary Carbon

Answer 15

Bonded to three.

Question 16

Quaternary Carbon

Answer 16

Bonded to four.

Question 17

Why is it carbon tetra valency?

Answer 17

Because carbon is a small molecule which cannot exceed the octet and will have always four.

Question 18

Boiling Points

Answer 18

More carbons, Higher.
More Ramifications, Lower.

Question 19

Melting Point

Answer 19

The more carbons and ramifications, the higher.

Question 20

Carbon’s state of aggregation at Stp

Answer 20

1-4 _Gas.
5-17_Liquid.
18 or more_Solid.

Question 21

Density

Answer 21

The more carbons, the higher the density.

Question 22

Solubility in hydrocarbons

Answer 22

Not soluble in water but they are soluble in non polar substances (Benzene,hexane…)