c7-organic chemistry

Question 1

What are hydrocarbons?

Answer 1

Compounds composed solely of hydrogen and carbon.

Question 2

What is crude oil?

Answer 2

A natural, unrefined petroleum product composed of hydrocarbon deposits.

Question 3

What is the general formula for alkanes?

Answer 3

CnH2n+2, where n is the number of carbon atoms.

Question 4

What is the general formula for alkenes?

Answer 4

CnH2n, where n is the number of carbon atoms.

Question 5

True or False: Alkenes are saturated hydrocarbons.

Answer 5

False, alkenes are unsaturated hydrocarbons.

Question 6

What is cracking in organic chemistry?

Answer 6

The process of breaking down larger hydrocarbon molecules into smaller, more useful ones.

Question 7

Which type of reaction occurs when alkenes are converted into alkanes?

Answer 7

Hydrogenation.

Question 8

Fill in the blank: Alkenes contain at least one _______ bond.

Answer 8

double

Question 9

What is the primary use of alkanes?

Answer 9

Fuel and lubricants.

Question 10

Name a common method of cracking.

Answer 10

Steam cracking.

Question 11

What is the main product of complete combustion of hydrocarbons?

Answer 11

Carbon dioxide and water.

Question 12

True or False: Crude oil can be separated into fractions by fractional distillation.

Answer 12

True.

Question 13

What is the boiling point trend in alkanes as the carbon chain length increases?

Answer 13

The boiling point increases.

Question 14

What are the first four alkanes in order?

Answer 14

Methane, Ethane, Propane, Butane.

Question 15

What is the significance of the double bond in alkenes?

Answer 15

It allows alkenes to undergo addition reactions.

Question 16

What is a common use for alkenes?

Answer 16

Production of plastics.

Question 17

What is the process of converting crude oil into useful products called?

Answer 17

Refining.

Question 18

Fill in the blank: The smallest alkane is _______.

Answer 18

Methane

Question 19

What is the main environmental concern with burning hydrocarbons?

Answer 19

Production of greenhouse gases.

Question 20

Which alkane has the molecular formula C4H10?

Answer 20

Butane.

Question 21

True or False: All alkenes are colorless gases at room temperature.

Answer 21

False, some are liquids.

Question 22

What type of bond is present in alkanes?

Answer 22

Single bonds.

Question 23

What is a polymerization reaction?

Answer 23

A process where small molecules (monomers) combine to form a large molecule (polymer).

Question 24

How do alkenes react with bromine water?

Answer 24

They decolorize bromine water, indicating unsaturation.

Question 25

What is the main purpose of catalytic cracking?

Answer 25

To increase the yield of gasoline from crude oil.

Question 26

What is the relationship between the number of carbon atoms and the physical properties of hydrocarbons?

Answer 26

As carbon atoms increase, the viscosity and boiling point generally increase.