Copy of 8Ea Burning Fuels alpha (1/7/2025) - Katie Bruce | Laabri

1

What are hydrocarbons made of?

Carbon and oxygen

Hydrogen and oxygen

Carbon and hydrogen

Carbon, hydrogen, and oxygen

1

Which of these is an example of a hydrocarbon?

Water (H₂O)

Methane (CH₄)

Carbon dioxide (CO₂)

Sodium chloride (NaCl)

1

What is crude oil mainly made of?

Metals

Hydrocarbons

Water

Rocks

1

Which process is used to separate crude oil into fractions?

Filtration

Crystallization

Fractional distillation

Electrolysis

1

What are the products of the complete combustion of a hydrocarbon?

Carbon dioxide and water

Carbon monoxide and water

Oxygen and water

Carbon and water

1

What is a common product of incomplete combustion?

Carbon dioxide

Carbon monoxide

Water

1

Which of these is a sign of incomplete combustion?

A) A bright blue flame

B) A smoky yellow flame

C) The production of water vapor

D) A loud explosion

1

How do you test for the presence of carbon dioxide gas?

A) It makes limewater cloudy

B) It pops a lit splint

C) It turns damp red litmus paper blue

D) It turns universal indicator green

1

What is the chemical name of limewater?

A) Calcium hydroxide solution

B) Sodium hydroxide solution

C) Potassium hydroxide solution

D) Ammonium hydroxide solution

1

During combustion, how is carbon dioxide formed?

A) By reacting carbon with oxygen

B) By splitting hydrogen from water

C) By mixing carbon monoxide with water

D) By heating hydrocarbons without oxygen