Hydrocarbons and Crude Oil Concepts

What is the definition of a hydrocarbon?

• Compounds made from hydrogen and oxygen atoms only

• Compounds made from carbon and oxygen atoms only

• Compounds made from hydrogen and carbon atoms only

• Compounds made from carbon, hydrogen, and oxygen atoms

What is the general formula for alkanes?

• CnH2n

• CnH2n-2

• CnH2n+2

• CnHn

How does the chain length of a hydrocarbon affect its boiling point?

• Longer chain length leads to a lower boiling point

• Shorter chain length leads to a higher boiling point

• Longer chain length leads to a higher boiling point

• Chain length has no effect on boiling point

What is the relationship between the chain length of a hydrocarbon and its flammability?

• Shorter chain length leads to lower flammability

• Longer chain length leads to higher flammability

• Shorter chain length leads to higher flammability

• Chain length has no effect on flammability

How does the chain length of a hydrocarbon affect its boiling point, viscosity, and flammability?

• Longer chain length leads to lower boiling point, lower viscosity, and higher flammability.

• Longer chain length leads to higher boiling point, higher viscosity, and lower flammability.

• Shorter chain length leads to higher boiling point, higher viscosity, and higher flammability.

• Shorter chain length leads to lower boiling point, higher viscosity, and lower flammability.

What is the state of matter for Propane (C3H8) at 25°C, given its melting point is -188°C and boiling point is -42°C?

• Solid

• Liquid

• Gas

• Plasma

Why is crude oil separated into different fractions?

• To increase its overall volume for storage.

• To make it easier to transport globally.

• To obtain sub-mixtures of hydrocarbons with similar properties suitable for specific uses.

• To remove impurities and make it environmentally friendly.

What is a fraction of crude oil?

• A pure chemical compound.

• A sub-mixture of hydrocarbons with similar chain lengths.

• A single type of hydrocarbon molecule.

• The solid residue left after heating crude oil.

What method is used to separate crude oil into its useful fractions?

• Simple distillation

• Fractional distillation

• Cracking

• Filtration

Which of the following crude oil fractions condenses at the lowest point in a fractional distillation column?

• Kerosene

• Diesel

• Fuel Oil

• Petroleum