Expert Chemistry Tutoring

Q1. Knowledge Recall (1 mark)

Define an allotrope.

Q2. Application (2 marks)

Explain why diamond is harder than graphite.

Q3. Data Analysis (3 marks)

The allotropes of carbon have different physical properties. The density of diamond is 3.5 g/cm³, graphite is 2.2 g/cm³, and fullerene is 1.7 g/cm³. Arrange these allotropes in order of increasing density.

Q4. Knowledge Recall (2 marks)

Describe the hybridization of carbon atoms in graphite.

Q5. Application (2 marks)

Explain why carbon allotropes have different electrical conductivities.

Q6. Calculation (3 marks)

A sample of graphite contains 1.2 × 10²³ carbon atoms. Calculate the mass of this sample in grams.

(Relative atomic mass of carbon = 12)

Q7. Knowledge Recall (1 mark)

Name the allotrope of carbon that has a hollow, spherical structure.

Q8. Application (2 marks)

Explain how the properties of carbon nanotubes make them useful in nanotechnology.

Q9. Knowledge Recall (2 marks)

Describe the bonding in diamond.

Q10. Chemical Equation (4 marks)

Graphite can be converted to diamond under high pressure and temperature. Write a balanced chemical equation for this conversion.