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WorksheetsCarbon Materials_week 4
Total questions: 10
Worksheet time: 5mins
Which of the following is not an allotrope of carbon?
Diamond
Graphite
Silica
Fullerenes
In graphite, each carbon atom is bonded to:
Two other carbon atoms in a linear chain
Three other carbon atoms in a planar hexagonal structure
Four other carbon atoms in a tetrahedral arrangement
One carbon atom and one hydrogen atom
Diamond is an excellent thermal conductor because:
It contains free electrons
It has sp²-hybridized carbon atoms
It has a strong three-dimensional covalent network
It contains metallic bonds
Which of the following carbon materials is one-atom thick?
Carbon nanotube
Graphene
Fullerene (C₆₀)
Activated carbon
Carbon nanotubes can be considered as:
Rolled-up sheets of graphene
Cross-linked polymeric carbons
Randomly oriented amorphous carbons
Crystalline diamond-like carbons
Which of the following is an amorphous carbon material?
Graphene
Diamond
Activated carbon
Carbon nanotube
Raman spectroscopy is widely used to characterize carbon materials because it provides information about:
Elemental composition only
Molecular weight
Vibrational modes and degree of graphitization
Surface area and pore volume
Which technique is best suited to determine the specific surface area of activated carbon?
X-ray diffraction (XRD)
Nitrogen adsorption/desorption (BET)
Fourier-transform infrared spectroscopy (FTIR)
Transmission electron microscopy (TEM)
n X-ray diffraction (XRD) analysis of carbon materials, a sharp peak around 2θ ≈ 26° typically indicates:
Highly amorphous carbon
Graphitic (002) crystal plane
Presence of oxygen-containing groups
Defective carbon structure
In scanning electron microscopy (SEM) analysis of carbon materials, what kind of information is mainly obtained?
Crystal lattice parameters
Elemental bonding and functional groups
Surface morphology and particle size
Degree of graphitization
