What is the study of organic chemistry primarily concerned with?

• Compounds containing carbon

• Compounds containing nitrogen

• Compounds containing oxygen

• Compounds containing metals

Which of the following is a fossil fuel?

• Crude oil

• Water

• Wood

• Plastic

How is crude oil formed?

• From dead plants over millions of years

• From dead marine organisms over millions of years

• From volcanic eruptions

• From chemical reactions in oceans

Which of the following is NOT a product of crude oil?

• Petrol

• Kerosene

• Nylon

• Wood

What are hydrocarbons made of?

• Hydrogen and nitrogen

• Carbon and oxygen

• Hydrogen and carbon

• Oxygen and nitrogen

What is the general formula for alkanes?

• CnHn+2

• CnH2n+2

• CnH2n

• CnH2n-2

Which of the following is an example of an alkane?

• Methane

• Ethene

• Propene

• Ethanol

What property of hydrocarbons increases as the chain length increases?

• Flammability

• Viscosity

• Solubility

• Reactivity

Which of the following hydrocarbons is likely to be a gas at room temperature?

• Methane (C₁H₄)

• Hexane (C₆H₁₄)

• Decane (C₁₀H₂₂)

• Octane (C₈H₁₈)

What happens to the boiling point of alkanes as the number of carbon atoms increases?

• It decreases

• It stays the same

• It increases

• It fluctuates randomly