EASY
Diploma
IMPORTANT
Earn 100

Name a thermotropic liquid crystal.

Important Questions on Materials

EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Questions>Q 1
Many of the compounds produced by cracking are used in the manufacture of addition polymers. State the essential structural feature of these compounds and explain its importance.
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Questions>Q 2
During the formation of poly(styrene), a volatile hydrocarbon such as pentane is often added. Describe how this affects the properties of the polymer and give one use for this product.
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Questions>Q 5
The manufacture of low density poly(ethene) is carried out at very high pressures and at a temperature of about 500 K. A catalyst (either an organic peroxide or a trace of oxygen) is added to the ethene. Explain how the catalyst reacts and write equations to show the mechanism of the polymerization.
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Exercise 9
How will the human immune system cope with particles on the nanoscale?
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Quick question
Nickel has a density of 8.91 g cm-3 and X-ray diffraction shows that the unit cell edge length is 0.3524 nm. Determine the packing structure for Ni.
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Questions>Q 4
Draw structures representing a face centred cubic and body centred cubic unit cell.
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Exercise 15
What makes a group on a benzene ring either an ortho-para or a meta director?
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Questions>Q 1
Which pair of compounds can be used to prepare CH3COOCH3?