Class 12 Chemistry · Chapter 15 · Test 1
Materials and Semiconductors
50 MCQs
50 questions · 40 min · 50 marks
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Sample questions
The first 5 of 50. Try each one, then tap to see the answer.
Question 1
A material is defined as:
- AAny substance or mixture of substances that makes up a physical object of daily-life or industrial importance
- BOnly a pure metal
- COnly a natural substance
- DOnly a plastic
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Answer: A
Plastics and metals and ceramics and building materials are all materials.
Question 2
Metals are good conductors of:
- ASound only
- BLight only
- CHeat and electricity
- DNeither heat nor electricity
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Answer: C
Metals are also hard and rigid and malleable and ductile.
Question 3
Metals can be rolled into sheets and drawn into wires because they are:
- ABrittle and hard
- BSoft and soluble
- CNon-conductors
- DMalleable and ductile
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Answer: D
They do not fracture when shaped.
Question 4
Steel is used in bridges and buildings because of its:
- AStrength
- BLow density
- CTransparency
- DLow melting point
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Answer: A
Strength is the property needed in construction.
Question 5
Aluminium is used in the bodies of aircraft because it is:
- AHeavy
- BLight-weight
- CMagnetic
- DRadioactive
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Answer: B
Low mass is important for aircraft.
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