DP Chemistry (last assessment 2024)

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Question 19M.3.sl.TZ1.6a

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.3.sl.TZ1.6a
Level sl Paper 3 Time zone TZ1
Command term Describe Question number a Adapted from N/A
a.
[Maximum mark: 2]
19M.3.sl.TZ1.6a

Nanotechnology has allowed the manipulation of materials on the atomic level.

(a)

Describe the structure and bonding of a carbon nanotube.

 

Structure:

Bonding:

[2]

Markscheme

Structure:
giant covalent/network covalent  [✔]

Note: Accept “cylindrical/tube shaped”.

Bonding:
each carbon covalently bonded to 3 other carbons
OR
each bond has order of 1.5

Note: Accept “has delocalized electrons” OR “has sp2 hybridization”.

Examiners report

Most students were aware that nanotubes have a tubular structure, but answers to the bonding were rarely detailed enough to gain the second mark.

Syllabus sections