Worksheetss3_chem_chp_13_test_b_eng
Total questions: 10
Worksheet time: 6mins
Gold is not commonly used today because it is difficult to extract from its ores.
T
F
Alloys are made by adding other metallic or non-metallic elements into metals.
T
F
Graphite is a hydrocarbon because it contains carbon atoms.
T
F
Gold and silver were the first metals used by humans because
they can be extracted easily.
they are abundant (豐富) in the Earth’s crust.
they can form compounds with other elements easily.
Which of the following statements explain why copper is used to make electrical wires?
Copper is ductile
Copper is a good conductor of thermal energy.
Copper is a good conductor of electricity.
Which of the following compounds is NOT a hydrocarbon?
Ethene
Polythene
Carbon dioxide
Liquefied petroleum gas
Which of the following statements about polythene bags are correct?
They are made up of macromolecules (polymer)
The raw materials for polythene bags come from crude oil.
Polythene bags can be decomposed by microorganisms quickly in Nature.
The method of extracting metal from its oxide by heating the oxide with carbon is called g . Carbon dioxide gas is produced in this reaction.
carbon reduction
electrolysis
mining
direct heating
The process of joining together many monomers to form a macromolecule is called
j .
polymer
polymerization
crystallization
distillation
Name the method of extracting crude oil
fractional distillation
evaporation
filtration
distillation
