EASY
Diploma
IMPORTANT
Earn 100

Explain which ion Mn2+ or Zn2+ will be attracted by a magnetic field and which will be repelled.

Important Questions on Materials

EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Quick questions>Q 2
Deduce how much copper can be electroplated from an aqueous solution of copper(II) sulphate by a current of 2 A running for 20 minutes.
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Models of catalysis
Can new theories or advances in areas such as nanotechnology find catalysts that are even more effective and environmentally sound?
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Questions>Q 2
State one advantage and one disadvantage that homogeneous catalysts have over heterogeneous catalysts.
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Questions>Q 2
Apart from their selectivity to form the required product and their cost, discuss two other factors which should be considered when choosing a suitable catalyst for an industrial process.
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Questions>Q 3
Compare the modes of action of homogeneous and heterogeneous catalysts. State one example of each type of catalysis using a chemical equation and include state symbols.
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Questions>Q 1
Liquid-crystal displays are used in digital watches, calculators, and laptops. Describe the liquid-crystal state, in terms of molecular arrangement, and explain what happens as temperature increases.
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Questions>Q 2
Discuss three properties a substance should have if it is to be used in liquid-crystal displays.
EASY
Diploma
IMPORTANT
Oxford IB Diploma Programme Chemistry Course Companion>Chapter 22 - Materials>Questions>Q 3
Kevlar is an example of a lyotropic liquid crystal. Outline what is meant by lyotropic liquid crystal.